Comparison of Satellite Observations of Nitrogen …...integrated observing network. This report...

NASA/TM–2006–214527

Comparison of Satellite Observationsof Nitrogen Dioxide to SurfaceMonitor Nitrogen DioxideConcentration

Mary M. Kleb, Margaret R. Pippin, R. Bradley Pierce, Doreen O. NeilLangley Research Center, Hampton, Virginia

Gretchen LingenfelserScience Applications International Corporation, Hampton, Virginia

James J. SzykmanUnited States Environmental Protection Agency, Research Triangle Park, North Carolina

December 2006

https://ntrs.nasa.gov/search.jsp?R=20070003600 2020-07-30T23:06:43+00:00Z

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NASA/TM–2006–214527

Comparison of Satellite Observationsof Nitrogen Dioxide to SurfaceMonitor Nitrogen DioxideConcentration

Mary M. Kleb, Margaret R. Pippin, R. Bradley Pierce, Doreen O. NeilLangley Research Center, Hampton, Virginia

Gretchen LingenfelserScience Applications International Corporation, Hampton, Virginia

James J. SzykmanUnited States Environmental Protection Agency, Research Triangle Park, North Carolina

National Aeronautics andSpace Administration

Langley Research CenterHampton, Virginia 23681-2199

December 2006

Acknowledgments

This work was sponsored by NASA’s Science Mission Directorate, Applied Sciences Program. The authorswish to gratefully acknowledge the GOME and AIRNow teams for making their data available for analysis.We also acknowledge the professional assistance of William Kleb, for providing the LaTex template andtechnical assistance with LaTex document preparation.

The use of trademarks or names of manufacturers in this report is for accurate reporting and does notconstitute an offical endorsement, either expressed or implied, of such products or manufacturers by theNational Aeronautics and Space Administration.

Available from:

NASA Center for AeroSpace Information (CASI) National Technical Information Service (NTIS)7121 Standard Drive 5285 Port Royal RoadHanover, MD 21076–1320 Springfield, VA 22161–2171(301) 621–0390 (703) 605–6000

Abstract

Nitrogen dioxide is one of the U. S. EPA’s criteria pollutants, and one of the main ingredientsneeded for the production of ground-level ozone. Both ozone and nitrogen dioxide causesevere public health problems. Existing satellites have begun to produce observational datasets for nitrogen dioxide. Under NASA’s Earth Science Applications Program, we examinedthe relationship between satellite observations and surface monitor observations of this airpollutant to examine if the satellite data can be used to facilitate a more capable andintegrated observing network. This report provides a comparison of satellite troposphericcolumn nitrogen dioxide to surface monitor nitrogen dioxide concentration for the periodfrom September 1996 through August 1997 at more than 300 individual locations in thecontinental US. We found that the spatial resolution and observation time of the satellitedid not capture the variability of this pollutant as measured at ground level.

The tools and processes developed to conduct this study will be applied to the anal-ysis of advanced satellite observations. One advanced instrument has significantly betterspatial resolution than the measurements studied here and operates with an afternoon over-pass time, providing a more representative distribution for once-per-day sampling of thisphotochemically active atmospheric constituent.

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Table of Contents

1 Executive Summary 3

2 Introduction 42.1 Criteria Pollutant and Scientific Rationale . . . . . . . . . . . . . . . . . . . . 42.2 Ground-based Measurement Characteristics . . . . . . . . . . . . . . . . . . . 42.3 Satellite-based Measurement Characteristics . . . . . . . . . . . . . . . . . . . 52.4 Objective of Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Site-by-site Satellite/In-Situ Comparison 63.1 Background on Time Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.2 Coincidence Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.3 Time Series Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.4 Site-by-site Correlation Analysis . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 National Satellite and In-Situ Comparisons 114.1 Maps of 80 km Binned Mean GOME Nitrogen Dioxide Statistics . . . . . . . 114.2 Site-by-site Mean Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.3 Regional Spatial Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 Effect of Satellite Footprint Size on Correlation 34

6 Conclusion 36

Appendix A Site-by-Site Satellite and EPA In-Situ Time Series 39

Appendix B Regional Mean Satellite and In-Situ Comparisons 263

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1 Executive Summary

We compared NO2 observations from the space-based Global Ozone Monitoring Experiment(GOME) instrument on the Second European Remote Sensing (ERS-2) satellite to UnitedStates Environmental Protection Agency (EPA) surface network measurements of NO2.This work was performed to prepare for similar comparisons of NASA’s Ozone MonitoringInstrument (OMI) NO2 observations when they become available. The satellite-surfacecomparisons indicate that GOME’s large footprint (320 x 40 km2) poorly represents thespatial variability of NO2 as determined by the surface network observations. OMI willhave significantly better spatial resolution (24 x 13 km2 at nadir). In addition, GOMEmeasurements are performed from an orbit with a 10:30 local overpass time. At this timeof day, large and rapid changes in the NO2 concentration occur. The OMI overpass occursat 13:30 local, with less rapidly changing NO2 concentration.

This work was funded by NASA’s Earth Science Applications Program within the Ap-plied Sciences Program of NASA’s Science Mission Directorate. Applied Sciences supportsprototyping and benchmarking the use of NASA-sponsored observations from remote sens-ing systems, and predictions from scientific research and modeling, to expand and acceleratethe use of knowledge, science, and technologies to serve society.

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2 Introduction

The Earth System responds to both naturally occurring and human-induced change. NASA’sScience Mission Directorate (SMD) seeks to understand the forcings and response of theEarth System via long-term observations from ground networks, sub-orbital platforms, andspace-based assets. The role of the Earth Science Applications Program within the ScienceMission Directorate is to incorporate these observations into decision support tools employedby partner Agencies and to assess the performance of these measurements in decision sup-port tools. The approach is to enable the use of Earth Science mission outputs (i.e., modelsand remote sensing data products) to serve as inputs to decision support systems. Ulti-mately, the desired outcome is an enhanced decision support tool that results in significantsocio-economic benefits.

2.1 Criteria Pollutant and Scientific Rationale

Under the Clean Air Act of 1990 (http://www.epa.gov/oar/caa/), the EPA is required toset standards for concentrations of air quality pollutants, ensure these standards are metthrough monitoring, and establish a consistent means of reporting air quality to the public,which, currently, is the Air Quality Index (AQI). The EPA is currently setting air qualitystandards related to the concentration levels of six main air pollutants: ozone, particulatematter, carbon monoxide, nitrogen oxides, sulfur dioxide, and lead. Nitrogen oxides (NOx)include NO and NO2, both highly reactive gases. NO is colorless and odorless, howeverNO2 can many times be seen as a red-brown layer over urban areas. NOx is a byproduct ofcombustion with 95% of NOx emissions from combustion in the form of NO [1]. Exhaustfrom motor vehicles accounts for 49% of NOx emissions. Other sources are electric utilities,and industrial, commercial and residential burning of fossil fuels [2]. Between 1980 and1999 NO2 emissions have increased by 4% while emissions of all other criteria pollutantshave decreased (between 1998 and 1999 carbon monoxide and lead emissions have increasedslightly while NO2 emissions have decreased slightly) [1].

There are many health and environmental impacts of NOx. NOx is one of the mainingredients needed for the production of ground-level ozone [3], [4], [5], [6]. Both NO2 andozone can cause serious respiratory problems [7], [8] and references cited therein. NOx reactsto form nitrate particles and acid aerosols which contribute to acid deposition and nutrientoverload in water [7], [9]. Excesses of NOx also decrease visibility [10]. In addition, whensequestered in a reservoir species, NOx can be transported long distances by prevailing windsand affect air quality in regions many miles from the source [11], [12], [13], [14].

The EPA has a ground network of monitoring stations around the US that are currentlybeing used to monitor NO2 concentration in well populated areas. Quantative satellite datacan be validated against the surface network in urban areas. Once validated, the satellitedata can provide NO2 distributions in remote continental areas, far from the surface networkstations, extending the integrated observing network. NASA satellite data may serve as atop-down constraint on emissions inventories for NO2, and could also provide evidence oflongrange transport between regions.

2.2 Ground-based Measurement Characteristics

The EPA ground network consists of in-situ NO2 monitoring stations located throughoutthe country, with higher concentrations of monitors in more densely populated regions.

These monitors are operated by the State and Local Air Monitoring Stations (SLAMS)and National Air Monitoring Stations (NAMS) networks. NO2 concentrations are measuredusing the chemiluminescence method. This method first converts NO2 to NO in a heatedcatalytic converter (typically molybdenum) followed by reaction of NO with ozone. This

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reaction forms an excited state of NO2 which releases a photon as it returns to a lowerenergy state. The photons are measured with a PMT (photomultiplier tube). The PMTsignal is proportional to the amount of NO in the sample. The detection limit of the EPAmonitors is 5 ppbv. Since the catalytic conversion is not specific to NO2, the chemilumi-nescence technique has been reported to overestimate NO2. Interferences by other chemicalspecies are considered small in urban areas where emissions are fresh. However, in ruraland remote regions where air mass aging can be a factor, this method can over predictNO2 levels [1]. Information on the list of designated reference and equivalent methods forNO2 can be found at http://www.epa.gov/ttn/amtic/files/ambient/criteria/ref905.pdf (lastupdated Sept. 2005).

2.3 Satellite-based Measurement Characteristics

The Global Ozone Monitoring Experiment (GOME), aboard the European Space Agency’sSecond European Remote Sensing (ERS-2) satellite has a 10:30am local equatorial overpasstime along a sun-synchronous polar orbit. GOME has a full swath width of 960 km whichis divided into three ground pixels (east, central or nadir, and west) relative to viewingstraight down, for a 40 km×320 km spatial resolution [15]. GOME has a 100 minute orbitwhich results in 14 orbits per day achieving global coverage in three days. For additionalinformation regarding GOME, see [15].

The GOME data product utilized in this study is nitrogen dioxide tropospheric column.A detailed discussion of the method used to derive the tropospheric nitrogen dioxide columnis given in [16]. In general, the stratospheric column is subtracted from the total column toyield the tropospheric column. The stratospheric NO2 column is approximated by using thetotal NO2 column over the central pacific where tropospheric NO2 is relatively low. Notethat GOME was not designed to measure tropospheric nitrogen dioxide; this product wasdeveloped after launch to support energing scientific interest in tropospheric composition.The NO2 column is sensitive to clouds, aerosols, and surface albedo, which increase theerror in tropospheric NO2 column. In addition, the GOME morning overpass occurs at atime of rapid change in tropospheric NO2 as NOx begins to repartition into NO and NO2.

2.4 Objective of Comparison

The objective of this work is to determine the quantitative relationship between troposphericcolumn NO2 as measured from space by GOME and the surface distribution of NO2 asmeasured by the EPA regulatory network.

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3 Site-by-site Satellite/In-Situ Comparison

3.1 Background on Time Period

The time period chosen for this analysis is September 1, 1996 through August 31, 1997. Thespecific dates were chosen based on availability of data. The length of time chosen allowsfor an analysis of the robustness of this comparison on a seasonal basis.

3.2 Coincidence Criteria

For the correlation analysis presented in Section 3.3, the data pairs of satellite troposphericNO2 column and ground-based NO2 concentration must be collocated in space and time.For every ground station, the 40× 320 km2 GOME observations that include the longitudeand latitude of the site are accumulated. The hourly surface NO2 data are then linearlyinterpolated to the time of each GOME observation. Only surface observations within plusor minus one hour are considered for possible temporal coincidences.

3.3 Time Series Analysis

In Figure 1, an example of the GOME tropospheric column NO2 and surface NO2 concen-tration time series for summer 1997 is presented. The time series plots for all the stations

EPA Surface and GOME Column NO2 19970601-19970831

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Figure 1: Time-series and correlations between GOME NO2 and hourly ground NO2 concen-trations for site 090010113 in Bridgeport, CT. Hourly surface NO2 concentration is shownwith the blue line. Coincident values are represented by symbols, a red bullet is GOMEtropospheric column NO2 and an asterisk is hourly surface NO2 concentration.

for fall 1996, winter 1996-97, spring 1997, and summer 1997 are provided in Appendix A onpage 39. In this analysis, we used the following seasonal definitions: September 1 through

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November 30, fall; December 1 through February 28, winter; March 1 through May 31,spring; and June 1 through August 31, summer. The state and county, Metropolitan Sta-tistical Area (MSA) description, and station ID are reported in the figures. If the site isrural, the MSA description is listed as “Not in an MSA”.

Figure 1 shows the hourly surface NO2 concentration during summer 1997. The leftvertical axis is surface NO2 concentration given in parts per billion by volume (ppbv) andthe right vertical axis is GOME tropospheric column NO2, given in molecules per cm2.Correlations are derived from coincident GOME tropospheric column NO2 and surface NO2

pairs as described in Section 3.2 on the facing page. Nposs is the total number of GOMEviewing opportunities over the site and NGOME corresponds to the number of passes thatNO2 tropospheric columns could be determined (limited by surface albedo, cloud cover, andaerosols). The number of coincident data pairs used to determine the correlation is reportedas Ncorr. At least ten coincident data pairs are required to calculate a correlation.

3.4 Site-by-site Correlation Analysis

Figure 2 on the next page summarizes the GOME tropospheric column NO2 density andsurface NO2 correlations derived from the time series for each ground station across theUnited States (see Appendix A on page 39). A summary is shown for fall (a), winter (b),spring (c), and summer (d). The size of the point plotted indicates the number of coincidentdata pairs at a particular location for each season shown. The color indicates the value of thecorrelation coefficient. This correlation summary provides a site specific and geographicalperspective on how well the GOME tropospheric column NO2 density retrievals depict thevariability in surface NO2 concentration. The value of the correlation varies widely fromseason to season and station to station. There are several reasons for this (which are alsosite specific) including the size of the GOME footprint. As an example, in the summer twostations located in northern Kentucky (Davies KY, station ID 210590005 and Henderson KY,station ID 211010013) are close geographically yet yield very different correlations. Thesestations both fall within the same GOME footprint, however it is possible the stations aresampling different air masses. On July 12, at the time of the GOME overpass, Daviesreports 33 ppbv of NO2 while Henderson reports 8 ppbv. GOME cannot resolve the smallerscale variability.

Figure 3 on page 10 shows histograms of the site-by-site correlations for fall (top left),winter (top right), spring (bottom left), and summer (bottom right). The histogramsshow correlations for a total of 242 ground stations (fall), 82 (winter), 216 (spring), and 245(summer). The histogram bin with the maximum number of stations is 0.3 to 0.4 for fall and0.2 to 0.3 for the remaining seasons. Between 49% and 56% of the stations have correlationswithin the 0.1 to 0.5 range. Less than 5% of the stations have correlations above 0.7.

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19960901-19961130 Correlation between EPA 1-hr surface NO2 and GOME column NO2

#Coincidences>2015-2010-15

-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0Correlation

(a) Fall.



-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0Correlation

(b) Winter.

Figure 2: National summary plot of correlations between GOME tropospheric column NO2

and EPA hourly NO2 concentration for September 1996 through August 1997.

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-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0Correlation

(c) Spring.



-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0Correlation

(d) Summer.

Figure 2: Concluded.

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Distribution of EPA and GOME NO2 Correlations

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Figure 3: Histograms of the site-by-site correlations between coincident GOME troposphericcolumn NO2 and EPA surface NO2 concentration for fall 1996, winter 1996-97, spring 1997,and summer 1997.

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4 National Satellite and In-Situ Comparisons

4.1 Maps of 80 km Binned Mean GOME Nitrogen Dioxide Statis-tics

Figure 4 on the following page shows maps of the mean GOME tropospheric column NO2

density for fall 1996 (a), winter 1996-97 (b), spring 1997 (c) and summer 1997 (d).To construct these maps, all the GOME column NO2 granules (40 km×320 km spatialresolution) obtained for each season are mapped onto the Eta Data Assimilation System(EDAS) 80 km grid. The mean, the standard deviation, and the counts of GOME columnNO2 at each grid point are derived from the re-gridded GOME tropospheric column NO2

density. The areas in black are where no GOME column NO2 is retrieved over a 80×80 km2

grid for the entire season.In general the highest GOME NO2 tropospheric column density occurs where there is

more urban activity (over the eastern region of the United States and southern California) forall seasons. A seasonal variability is observed in the eastern US with a maximum occurringin the winter and minimum in the summer. This is consistent with slower photochemicalactivity during the winter.

Figure 5 on page 14 shows the seasonal maps of the standard deviation of the 80 kmbinned GOME tropospheric column NO2 density for fall 1996 (a), winter 1996-97 (b), spring1997 (c) and summer 1997 (d). Figure 6 on page 16 shows the seasonal maps of thenumber of GOME tropospheric column NO2 retrievals used to obtain the 80 km binnedstatistics for fall 1996 (a), winter 1996-97 (b), spring 1997 (c) and summer 1997 (d). Thestandard deviation is greatest in the winter with highest values occurring in the northeasternUS. Regions of higher standard deviations also occur in the central Midwest and southernCalifornia in the winter. During the winter across the northern United States the numberof retrievals is typically lower than five. This is a result of GOME’s sensitivity to surfacealbedo. Localized regions of higher standard deviations such as in southern California reflectreal variations in NO2 associated with major urban areas. During the summer GOME hasfewer retrievals in the eastern US than in the western US, with a minimum over Kentucky,due to the greater frequency of cloud cover in the summer [17], [18].

4.2 Site-by-site Mean Statistics

The amount of information that GOME tropospheric column NO2 density could potentiallycontribute to characterization of the mean spatial distribution of EPA surface NO2 con-centration is quantified by comparing the site-by-site mean and standard deviations of theEPA ground stations and GOME tropospheric column NO2 density. Figure 7 on page 18shows the site-by-site distribution of mean EPA surface NO2 concentration (top) and meanGOME tropospheric column NO2 density (bottom) for fall 1996. Winter, spring, andsummer maps are shown in Figure 8 on page 19, Figure 9 on page 20, and Figure 10 onpage 21, respectively.

In general the GOME tropospheric column NO2 density values show the same trendsas EPA surface NO2 concentration. One notable exception is southern Pennsylvania andthe northeast corridor from Washington DC to New York City. In this region during fall,winter, and spring, the GOME tropospheric column NO2 density is elevated relative to theGOME values at other sites while the EPA surface NO2 concentration is not as elevated.This difference is likely due to NO2 transport above the boundary layer and therefore notsampled by the EPA surface network.

Figure 11 on page 22 shows the site-by-site distribution of the standard deviation ofthe coincident EPA ground station NO2 concentration (top) and mean GOME troposphericcolumn NO2 density (bottom) for fall 1996. Winter, spring, and summer maps of the

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19960901-19961130 GOME Mean NO2

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19961201-19970228 GOME Mean NO2

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(b) Winter.

Figure 4: Map of the mean 80 km GOME NO2 for September 1996 through August 1997.

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19970301-19970531 GOME Mean NO2

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19970601-19970831 GOME Mean NO2

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19960901-19961130 GOME NO2 Standard Deviation

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Figure 5: Map of the standard deviation of the 80 km binned GOME NO2 for September1996 through August 1997.

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19960901-19961130 GOME NO2 Counts

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Figure 6: Map of the number of GOME NO2 retrievals within each 80 km bin for September1996 through August 1997.

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19970301-19970531 GOME NO2 Counts

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19960901-19961130 EPA Mean NO2


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0 5 10 15 201X1015 mol/cm2

Figure 7: Site-by-site distribution of mean EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) for fall 1996.

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19961201-19970228 EPA Mean NO2


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0 5 10 15 201X1015 mol/cm2

Figure 8: Site-by-site distribution of mean EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) for winter 1996-97.

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19970301-19970531 EPA Mean NO2


0 10 20 30 40 50 60ppbv

19970301-19970531 GOME Mean NO2


0 5 10 15 201X1015 mol/cm2

Figure 9: Site-by-site distribution of mean EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) for spring 1997.

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19970601-19970831 EPA Mean NO2


0 10 20 30 40 50 60ppbv

19970601-19970831 GOME Mean NO2


0 5 10 15 201X1015 mol/cm2

Figure 10: Site-by-site distribution of mean EPA surface NO2 concentration (top) andGOME tropospheric column NO2 (bottom) for summer 1997.

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19960901-19961130 EPA NO2 Standard Deviation


0 10 20 30 40 50 60ppbv



0 5 10 15 201X1015 mol/cm2

Figure 11: Site-by-site distribution of EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) standard deviations for fall 1996.

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EPA and GOME standard deviations are shown in Figures 12 on the following page, 13 onpage 25, and 14 on page 26, respectively. Both EPA and GOME show an elevated standarddeviation in southern California consistent with an elevated standard deviation in the 80km binned GOME NO2 (Figure 5 on page 14).

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0 10 20 30 40 50 60ppbv



0 5 10 15 201X1015 mol/cm2

Figure 12: Site-by-site distribution of EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) standard deviations for winter 1996-97.

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0 10 20 30 40 50 60ppbv



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Figure 13: Site-by-site distribution of EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) standard deviations for spring 1997.

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0 10 20 30 40 50 60ppbv



0 5 10 15 201X1015 mol/cm2

Figure 14: Site-by-site distribution of EPA surface NO2 concentration (top) and GOMEtropospheric column NO2 (bottom) standard deviations for summer 1997.

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4.3 Regional Spatial Statistics

The comparison of maps of EPA surface NO2 concentration and GOME tropospheric columnNO2 density site-by-site mean and standard deviations show that GOME tropospheric col-umn NO2 density may provide useful qualitative information about the spatial distributionof mean surface NO2 concentration from fall 1996 through summer 1997. However, there issignificant site-to-site variation in the agreement between the mean EPA surface and GOMEmeasurements. To quantify the spatial information content in the mean GOME measure-ments the correlations between the site-by-site means and standard deviations within eachof the EPA regions are considered. Figure 15 shows a map of the EPA regions. Onlycontinental US regions were considered in this analysis.

Figure 15: Map of EPA regions 1 through 10.

Figure 16 on the next page is an example of the spatial correlations between GOMEtropospheric column NO2 density and EPA surface NO2 concentration and the means andstandard deviations of GOME tropospheric column NO2 density and EPA surface NO2 con-centration for each ground station within EPA region 2 during summer 1997. The data inthe top panel depicts all the EPA/GOME coincident data pairs at every ground station inregion 2 that had at least 10 coincidences and the correlation computed from those coinci-dent pairs. The middle panel depicts coincident data averaged at each ground station (thenumber of crosses corresponds to the number of stations with at least 10 coincidences in thatregion) and the associated correlation. The bottom panel depicts the standard deviationat each ground station (with at least 10 coincidences) and the associated correlation. Ap-pendix B on page 263 presents these spatial correlations for each EPA region for fall 1996,

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Correlation of EPA and GOME NO2

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(ppb

v)

19970601-19970831Region 02r=0.531099n=15

Figure 16: Spatial correlations between measurements, means, and standard deviations ofGOME tropospheric column NO2 and EPA surface NO2 concentration for EPA region 2during summer 1997.

28

winter 1996-97, spring 1997, and summer 1997 (provided sufficient data exists to computethe correlations). The spatial correlation between the GOME tropospheric column NO2

density and the EPA surface NO2 concentration within region 2 in the summer (top panelof Figure 16 on the preceding page is low ( .34)). This value is consistent with the trendshown in summer histogram in Figure 3 on page 10. The spatial correlation between thesite-by-site means (center panel of Figure 16 on the preceding page is higher ( .56)). Site-by-site averaging within a region does not always result in an improved correlation, but everytime the correlation does improve it is in a region with high urban activity. Site-by-siteaveraging improved the correlation in region 9 for every season.

Figure 17 on the following page through Figure 20 on page 33 are similar to Figure 16on the facing page except that they contain the seasonal correlations for all the data inthe contiguous United States. Grouping the data nationally increases the correlations,however the highest seasonal correlation of the coincident pairs (top panels) is still lessthan 0.5 ( 0.45). Averaging the coincident pairs at each station (center panels) increasesesthe correlations further to a range of 0.47 to 0.64. When grouped this way, more datacan be included in the calculations of correlations. For example, when segregated intoregions during winter, only region 9 contained enough stations with sufficient winter data tocalculate the correlations. Regions 7 and 10 did not have sufficient data during any seasonfor a regional analysis, however, when grouped nationally, this data could be included.

29


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130r=0.422754n=4080


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130r=0.548197n=242


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130r=0.281714n=242

Figure 17: Spatial correlations between measurements, means, and standard deviations ofGOME tropospheric column NO2 and EPA surface NO2 concentration for EPA the entireUS during fall 1996.

30


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228r=0.344867n=1075


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228r=0.470784n=82


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228r=0.276686n=82

Figure 18: Spatial correlations between measurements, means, and standard deviations ofGOME tropospheric column NO2 and EPA surface NO2 concentration for EPA the entireUS during winter 1996-97.

31


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531r=0.443447n=3710


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531r=0.512192n=216


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531r=0.398821n=216

Figure 19: Spatial correlations between measurements, means, and standard deviations ofGOME tropospheric column NO2 and EPA surface NO2 concentration for EPA the entireUS during spring 1997.

32


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831r=0.457625n=4275


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831r=0.640934n=246


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831r=0.562089n=246

Figure 20: Spatial correlations between measurements, means, and standard deviations ofGOME tropospheric column NO2 and EPA surface NO2 concentration for EPA the entireUS during summer 1997.

33

5 Effect of Satellite Footprint Size on Correlation

Additional analysis was performed to investigate the effect the size of the GOME footprinthas on the correlation between the EPA surface NO2 concentration and the GOME tropo-spheric column NO2 density. Hourly values of NO2 emissions on a 20 × 20 km grid overthe continental United States were obtained from the 1999 EPA emissions inventory. Twosynthetic databases were created by using the EPA inventory as a proxy for the EPA sur-face measurements and the GOME retrievals for June, July, and August. To create thesynthetic EPA data record, the emission value associated with the grid box the station islocated inside is assigned to that station. This method was used to define hourly valuesfor every station in the contiguous US. To determine the synthetic GOME value, emissionvalues for all emission grid center points within a 1997 GOME footprint boundary wereaveraged. Due to the unavailability of emission data for the entire three month period, Julydata was repeated for each month. Neither the mismatch in year between the emission dataand the GOME footprints or the use of only July emission data to define synthetic valuesfor the entire summer impact the correlations calculated.

Figure 21 shows the correlations calculated at each ground station site for summer. This

Correlation between synthetic EPA surface NO2 and synthetic GOME column NO2 for summer


-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0Correlation

Figure 21: National summary plot of correlations between synthetic GOME values andsynthetic EPA hourly data for June through August.

figure is analogous to Figure 2 on page 8 (summer). Since there were no data gaps in thesynthetic ground station data or the synthetic GOME retrievals, a coincidence occurred forevery GOME overpass for each ground station in the contiguous US. However, the correla-tions tend to be higher in Figure 2 on page 8 than in Figure 21 likely due to a bias introducedby not using a weighted average to calculate the synthetic GOME retrievals (for example,see California, Texas, the Chicago area, and the Northeast). After artificially reducing thesize of the GOME footprint to 0.1◦×0.1◦ about the center point, five coincidences resulted.The coincident synthetic EPA and GOME values were within 0.5% for three of the stations

34

and within 4.3% and 5.3% for the remaining two stations. In general,this analysis indicatesthe GOME footprint is too large to get meaningful comparisons with the ground stationdata. Other studies have shown that in some instances the GOME resolution can be in-creased in certain ways to compensate for the large footprint and better correlations within-situ measurements can be achieved [19], [20].

35

6 Conclusion

This technical evaluation of the relationship between EPA surface NO2 concentration andsatellite-observed tropospheric NO2 column density during the period from September 1996through August 1997 indicates that the GOME data do not represent the distribution ofsurface NO2 as observed by the EPA regulatory network. GOME resolution is insufficientto resolve the variability (spatially and temporally) indicated in the ground station dataand illustrated in this analysis using synthetic EPA and GOME values. In addition, theGOME (10:30 local) overpass occurs during a time of rapid change in tropospheric NO2

as NOx begins to repartition into NO and NO2. The coarse spatial resolution of GOME,the GOME morning overpass design, and GOME’s insufficient sampling frequency for aphotochemically active constituent, do not contribute meaningful data for the distributionof NO2 in the lower atmosphere.

The tools and processes developed to conduct this study will be applied to the analysisof OMI NO2 observations in the near future. OMI has significantly better spatial resolutionthan GOME; 39 OMI data points exist within one GOME footprint. OMI also operates withan afternoon (13:30 local) overpass time, providing a more representative NO2 distributionfor once-per-day sampling. We expect substantially better correlation between OMI NO2

and surface observations of NO2.

36

References

1. United States Environmental Protection Agency: National Air Quality and EmissionsTrends Report, 1999. EPA 454/r-01-004, Office of Air Quality Planning and Standards,Research Triangle Park NC 27711, March 1999.

2. Godish, T.: Air Quality . Lewis Books, Boca Raton Florida, fourth ed., 2003.

3. Kasibhatla, P.; Levy, H.; Moxim, W.; and Chameides, W.: The relative impor-tance of stratospheric photochemical production on tropospheric NOy levels: A modelstudy. Journal of Geophysical Research, vol. 96, no. D10, 1991, pp. 18,631–18,646.doi:10.1029/91JD01665.

4. Penner, J.; Athertson, C.; Dignon, J.; Ghan, S.; Walton, J.; and Hameed, S.:Tropospheric nitrogen: A three-dimensional study of source, distributions, and de-position. Journal of Geophysical Research, vol. 96, no. D1, 1991, pp. 959–990.doi:10.1029/90JD02228.

5. Murphy, D.; Fahey, D.; Proffitt, M.; Liu, S.; Eubank, C.; Kawa, S.; and Kelly, K.:Reactive odd nitrogen and its correlation with ozone in the lower stratosphere andupper troposphere. Journal of Geophysical Research, vol. 98, no. D5, 1993, pp. 8751–8773. doi:10.1029/92JD00681.

6. Jacob, D.; Heikes, B.; Fan, S.-M.; Logan, J.; Mauzerall, D.; Bradshaw, J.; Singh, H.;Gregory, G.; Talbot, R.; Blake, D.; and Sachse, G.: Origin of ozone and NOx in thetropical troposphere: A photochemical analysis of aircraft observations over the SouthAtlantic basin. Journal of Geophysical Research, vol. 101, no. D19, 1996, pp. 24,235–24,250. doi:10.1029/96JD00336.

7. National Research Council: Rethinking the Ozone Problem in Urban and Regional AirPollution. National Academy Press, 1991.

8. Curtis, L.; Rea, W.; Smith-Willis, P.; Fenyves, E.; and Pan, Y.: Adverse health effectsof outdoor air pollutants. Environment International , vol. 32, May 2006, pp. 815–830.

9. Stoddard, J.; Jeffries, D.; Lukewille, A.; Clair, T.; Dillon, P.; Driscoll, C.; Forsius, M.;Johannessen, M.; Kahl, J.; Kellogg, J.; Kemp, A.; Mannio, J.; Monteith, D.; Murdoch,P.; Patrick, S.; Rebsdorf, A.; Skjelkvale, B.; Stainton, M.; Traaen, T.; van Dam, H.;Webster, K.; Wieting, J.; and Wilander, A.: Regional trends in aquatic recovery fromacidification in North America and Europe. Nature, vol. 401, no. 6753, 1999, pp. 575–578.

10. National Research Council: Protecting Visibility in National Parks and Wilderness Ar-eas. National Academy Press, 1993.

11. Spichtinger, N.; Wenig, M.; James, P.; Wagner, T.; Platt, U.; and Stohl, A.: Satellite de-tection of a continental-scale plume of nitrogen oxides from boreal forest fires. Geophys-ical Research Letters, vol. 28, no. 24, 2001, pp. 4579–4582. doi:10.1029/2001GL013484.

12. Kleinman, L.; Daum, P.; Imre, D.; Lee, Y.-N.; Nunnermaker, L.; Springston, S.;Weinstein-Lloyd, J.; and Rudolph, J.: Ozone production rate and hydrocarbon re-activity in 5 urban areas: A cause of high ozone concentration in Houston. GeophysicalResearch Letters, vol. 29, no. 10, 2002. doi:10.1029/2001GL014569.

37

13. Murphy, D.; Fahey, D.; Proffitt, M.; Liu, S.; Eubank, C.; Kawa, S.; and Kelly, K.: Effectof petrochemical industrial emissions of reactive alkenes and NOx on tropospheric ozoneformation in Houston, Texas. Journal of Geophysical Research, vol. 108, no. D8, 2003.doi:10.1029/2002JD003070.

14. Wenig, M.; Spichtinger, A.; Stohl, A.; Held, G.; Beirle, S.; Wagner, T.; Jahne, B.; andPlatt, U.: Intercontinental transport of nitrogen oxide pollution plumes. AtmosphericChemistry and Physics Discussions, vol. 2, no. 6, 2003, pp. 2151–2165.

15. Burrows, J. P.; Weber, M.; Buchwitz, M.; Rozanov, V.; Ladstatter-Weißenmayer, A.;Richter, A.; DeBeek, R.; Hoogen, R.; Bramstedt, K.; Eichmann, K.-U.; Eisinger, M.;and Perner, D.: The Global Ozone Monitoring Experiment (GOME): Mission Conceptand First Results. Journal of the Atmospheric Sciences, vol. 56, January 1999, pp. 151–175.

16. Martin, R. V.; Chance, K.; Jacob, D. J.; Kurosu, T. P.; Spurr, R. J. D.; Bucsela, E.;Gleason, J. F.; Palmer, P. I.; Bey, I.; Fiore, A. M.; Li, Q.; Yantosca, R. M.; and Koele-meijer, R. B. A.: An improved retrieval of tropospheric nitrogen dioxide from GOME.Journal of Geophysical Research, vol. 107, no. D20, 2002. doi:10.1029/2001JD001027.

17. Hahn, C. J.; Warren, S. G.; Eastman, R.; and Rigor, I. G.: Climatic Atlas of CloudsOver Land. August 2002. Http://www.atmos.washington.edu/ ignatius/CloudMap/.

18. Warren, S.; Hahn, C. J.; London, J.; Chervin, R. M.; and Jenne, R. L.: 1986: Globaldistribution of total cloud cover and cloud type amounts over land. NCAR TechnicalNote NCAR/TN-273 + STR., Boulder, CO.

19. Petritoli, A.; Bonasoni, P.; Giovanelli, G.; Ravegnani, F.; Kostadinov, I.; Bortoli,D.; Weiss, A.; Schaub, D.; Richter, A.; and Fortezza, F.: First comparison be-tween ground-based and satellite-borne measurements of tropospheric nitrogen diox-ide in the Po basin. Journal of Geophysical Research, vol. 109, no. D15307, 2004.doi:10.1029/2004JD004547.

20. Martin, R. V.; Parrish, D. D.; Ryerson, T. B.; Nicks, D. K.; Chance, K.; Kurosu,T. P.; Jacob, D. J.; Sturges, E. D.; Fried, A.; and Wert, B. P.: Evaluation of GOMEsatellite measurements of tropospheric NO2 and HCHO using regional data from aircraftcampaigns in the southeastern United States. Journal of Geophysical Research, vol. 109,no. D24307, 2004. doi:10.1029/2004JD004869.

38

A Site-by-Site Satellite and EPA In-Situ Time Series

This appendix contains Table 1, which begins on the next page, and the site-by-site satelliteand in-situ time series plots for all of the ground stations used in this analysis, which beginon page 49.

Table 1 lists the pertinent information (EPA region, station ID, state, county, longitude,latitude, fall, winter, spring, summer, MSA number, and MSA description) for the groundstation sites, organized by EPA region. For each station a check in a season column indicatesthe presence of a time series plot for that season. The absence of a check indicates thatthere were not at least ten coincidences for that season and thus no time series plot wasproduced (indicated with the “Insufficient Coincident Data” panel). The time series plotsare listed in the same order as the stations in Table 1. From left to right, the panels showfall and winter in the first row and spring and summer in the second row.

39

Tab

le1:

United

Sta

tes

EPA

Gro

und

Sta

tion

Sites

,A

vera

ged

byM

SA

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

1090010113-1

CT

Fai

rfiel

d-7

3.1

941.1

8X

XX

1160

Bridgep

ort,

CT

1090019003-1

CT

Fai

rfiel

d-7

3.3

441.1

2X

1160

Bridgep

ort,

CT

1090031003-1

CT

Har

tfor

d-7

2.6

341.7

8X

3280

Har

tfor

d,CT

1090091123-1

CT

New

Hav

en-7

2.9

241.3

1X

XX

1160

Bridgep

ort,

CT

1250051005-1

MA

Brist

ol

-71.1

542.0

6X

6480

Pro

viden

ce-F

allRiv

er-W

arw

ick,

RI-M

A1

250092006-1

MA

Ess

ex-7

0.9

742.4

7X

XX

1120

Bost

on,M

A-N

H1

250130008-1

MA

Ham

pden

-72.5

642.1

9X

8000

Spr

ingfiel

d,M

A1

250130016-1

MA

Ham

pden

-72.5

942.1

1X

XX

8000

Spr

ingfiel

d,M

A1

250250002-1

MA

Suffolk

-71.1

042.3

5X

XX

1120

Bost

on,M

A-N

H1

250250021-1

MA

Suffolk

-71.0

342.3

8X

XX

1120

Bost

on,M

A-N

H1

250250040-1

MA

Suffolk

-71.0

442.3

5X

XX

1120

Bost

on,M

A-N

H1

250251003-1

MA

Suffolk

-71.0

342.4

0X

XX

1120

Bost

on,M

A-N

H1

250270020-1

MA

Wor

cest

er-7

1.8

042.2

7X

XX

-(n

ot

inan

MSA

)1

230313002-1

ME

Yor

k-7

0.7

543.0

8X

X-

(not

inan

MSA

)1

330110016-1

NH

Hill

sbor

ough

-71.4

642.9

9X

XX

5350

Nas

hua,

NH

1330150009-1

NH

Rock

ingham

-70.7

643.0

8X

X6450

Por

tsm

outh

-Roch

este

r,N

H-M

E1

440070012-2

RI

Pro

viden

ce-7

1.4

141.8

3X

XX

6480

Pro

viden

ce-F

allRiv

er-W

arw

ick,

RI-M

A1

440071010-1

RI

Pro

viden

ce-7

1.3

641.8

4X

6480

Pro

viden

ce-F

allRiv

er-W

arw

ick,

RI-M

A1

500070003-1

VT

Chitte

nden

-73.2

144.4

8X

1305

Burlin

gto

n,V

T2

340030001-1

NJ

Ber

gen

-73.9

940.8

1X

XX

0875

Ber

gen

-Pas

saic

,N

J2

340070003-2

NJ

Cam

den

-75.1

039.9

2X

XX

6160

Phila

del

phia

,PA

-NJ

2340130011-1

NJ

Ess

ex-7

4.1

440.7

3X

XX

5640

New

ark,

NJ

2340131003-1

NJ

Ess

ex-7

4.2

040.7

6X

XX

5640

New

ark,

NJ

2340170006-1

NJ

Hudso

n-7

4.1

340.6

7X

XX

3640

Jers

eyCity,

NJ

2340210005-1

NJ

Mer

cer

-74.7

540.2

8X

X8480

Tre

nto

n,N

J2

340230011-1

NJ

Mid

dle

sex

-74.4

340.4

7X

XX

5015

Mid

dle

sex-

Som

erse

t-H

unte

rdon,N

J2

340390004-2

NJ

Unio

n-7

4.2

140.6

4X

XX

5640

New

ark,

NJ

2340390008-1

NJ

Unio

n-7

4.4

440.6

0X

XX

X5640

New

ark,

NJ

2360010012-1

NY

Alb

any

-73.7

642.6

8X

0160

Alb

any-

Sch

enec

tady-

Tro

y,N

Y2

360050080-1

NY

Bro

nx

-73.9

240.8

4X

XX

5600

New

Yor

k,N

Y2

360050083-1

NY

Bro

nx

-73.8

840.8

7X

X5600

New

Yor

k,N

Y2

360290002-1

NY

Erie

-78.7

742.9

9X

X1280

Buffal

o-N

iagar

aFal

ls,N

Y

40

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

2360290005-3

NY

Erie

-78.8

142.8

8X

X1280

Buffal

o-N

iagar

aFal

ls,N

Y2

360590005-2

NY

Nas

sau

-73.5

940.7

4X

XX

5380

Nas

sau-S

uffolk

,N

Y2

360610010-1

NY

New

Yor

k-7

3.9

940.7

4X

X5600

New

Yor

k,N

Y2

360610056-1

NY

New

Yor

k-7

3.9

740.7

6X

XX

5600

New

Yor

k,N

Y3

110010025-1

DC

Distr

ict

ofCol

-77.0

238.9

8X

XX

X8840

Was

hin

gto

n,D

C-M

D-V

A-W

V3

110010041-1

DC

Distr

ict

ofCol

-76.9

538.9

0X

XX

X8840

Was

hin

gto

n,D

C-M

D-V

A-W

V3

110010043-1

DC

Distr

ict

ofCol

-77.0

138.9

2X

8840

Was

hin

gto

n,D

C-M

D-V

A-W

V3

100031003-1

DE

New

Cas

tle

-75.4

939.7

6X

X9160

Wilm

ingto

n-N

ewar

k,D

E-M

D3

240030019-3

MD

Anne

Aru

ndel

-76.7

339.1

0X

0720

Bal

tim

ore,

MD

3240053001-2

MD

Bal

tim

ore

-76.4

739.3

1X

0720

Bal

tim

ore,

MD

3245100040-1

MD

Bal

tim

ore

City

-76.6

039.3

0X

XX

X0720

Bal

tim

ore,

MD

3245100050-1

MD

Bal

tim

ore

City

-76.5

839.3

2X

0720

Bal

tim

ore,

MD

3245100051-1

MD

Bal

tim

ore

City

-76.6

039.2

8X

0720

Bal

tim

ore,

MD

3420030008-1

PA

Alle

ghen

y-7

9.9

640.4

7X

XX

6280

Pitts

burg

h,PA

3420030031-1

PA

Alle

ghen

y-7

9.9

940.4

4X

XX

6280

Pitts

burg

h,PA

3420110009-1

PA

Ber

ks-7

5.9

340.3

2X

XX

6680

Rea

din

g,PA

3420170012-1

PA

Buck

s-7

4.8

840.1

1X

XX

6160

Phila

del

phia

,PA

-NJ

3420210011-1

PA

Cam

bria

-78.9

240.3

1X

3680

Johnst

own,PA

3420430401-1

PA

Dau

phin

-76.8

440.2

5X

XX

3240

Har

risb

urg

-Leb

anon-C

arlis

le,PA

3420450002-1

PA

Del

awar

e-7

5.3

739.8

4X

X6160

Phila

del

phia

,PA

-NJ

3420490003-1

PA

Erie

-80.0

442.1

4X

2360

Erie,

PA

3420710007-1

PA

Lan

cast

er-7

6.2

840.0

5X

X4000

Lan

cast

er,PA

3420730015-1

PA

Law

rence

-80.3

541.0

0X

X-

(not

inan

MSA

)3

420770004-1

PA

Leh

igh

-75.4

340.6

1X

X0240

Alle

nto

wn-B

ethle

hem

-Eas

ton,PA

3420910013-1

PA

Montg

om

ery

-75.3

140.1

1X

XX

6160

Phila

del

phia

,PA

-NJ

3420990301-1

PA

Per

ry-7

7.1

740.4

6X

3240

Har

risb

urg

-Leb

anon-C

arlis

le,PA

3421010004-3

PA

Phila

del

phia

-75.1

040.0

1X

XX

6160

Phila

del

phia

,PA

-NJ

3421010029-2

PA

Phila

del

phia

-75.1

739.9

6X

XX

6160

Phila

del

phia

,PA

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del

phia

-75.1

739.9

4X

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6160

Phila

del

phia

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3421250005-1

PA

Was

hin

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5X

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6280

Pitts

burg

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PA

Was

hin

gto

n-8

0.2

640.1

7X

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Pitts

burg

h,PA

3421330008-1

PA

Yor

k-7

6.7

039.9

7X

XX

9280

Yor

k,PA

41

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

3510130020-1

VA

Arlin

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n-7

7.0

638.8

6X

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Was

hin

gto

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hm

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3510590005-1

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Fai

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-77.4

738.8

9X

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hin

gto

n,D

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VA

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4X

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Was

hin

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n,D

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VA

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VA

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AL

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AL

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FL

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0X

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6X

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0X

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9X

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GA

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8X

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KY

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7X

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KY

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Jeffer

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6X

4520

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KY

Jeffer

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-85.7

138.2

6X

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Louisvi

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4211170007-2

KY

Ken

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-84.5

339.0

7X

1640

Cin

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Y-IN

4211451024-1

KY

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rack

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8.5

737.0

6X

-(n

ot

inan

MSA

)

42

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

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4370670022-1

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1X

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5X

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SC

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Gre

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TN

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635.2

8X

XX

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ot

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TN

Dav

idso

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1X

5360

Nas

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471050003-1

TN

Loudon

-84.3

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9X

3840

Knox

ville

,T

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471070101-1

TN

McM

inn

-84.7

535.3

0X

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-(n

ot

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TN

Shel

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0.0

435.1

5X

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4920

Mem

phis,T

N-A

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471630007-1

TN

Sulli

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-82.5

236.5

3X

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Johnso

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gsp

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ol,

TN

-VA

5170310063-1

ILCook

-87.6

341.8

8X

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1600

Chic

ago,IL

5170310064-1

ILCook

-87.6

041.7

9X

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Chic

ago,IL

5170310072-1

ILCook

-87.6

141.9

0X

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Chic

ago,IL

5170313101-1

ILCook

-87.8

941.9

6X

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1600

Chic

ago,IL

5170314002-1

ILCook

-87.7

541.8

6X

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5170314201-1

ILCook

-87.8

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741.6

3X

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Chic

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5170971007-1

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5171630010-2

ILSt

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638.6

1X

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7040

St.

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5180890022-1

INLak

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1X

2960

Gar

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5180891016-2

INLak

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7.3

341.6

0X

X2960

Gar

y,IN

5181410012-1

INSt

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ph

-86.4

641.7

0X

7800

South

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5181411008-1

INSt

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ph

-86.2

441.6

9X

7800

South

Ben

d,IN

5260990009-1

MI

Mac

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2.7

942.7

3X

2160

Det

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261630016-1

MI

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-83.1

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6X

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Det

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MI

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-83.0

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3X

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Det

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270370020-1

MN

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-93.0

344.7

6X

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5120

Min

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8X

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9X

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OH

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OH

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Ham

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43

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

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crip

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5390811012-2

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2X

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6481130069-2

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6481130087-1

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6481410027-1

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931.7

6X

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5X

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7X

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Har

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-95.4

929.8

3X

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3360

Houst

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482011034-1

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Har

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-95.2

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7X

3360

Houst

on,T

X6

482011035-1

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ris

-95.2

629.7

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X3360

Houst

on,T

X

44

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

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6482011037-1

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7X

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2X

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4X

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3X

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2X

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St

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538.6

8X

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Den

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2X

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8080590006-1

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Jeffer

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8380570124-1

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Mer

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347.4

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490110001-1

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Dav

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11.8

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9X

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11.9

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040130019-1

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Mar

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8X

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-112.0

433.4

6X

XX

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9040133003-1

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Mar

icopa

-111.9

233.4

8X

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AZ

9040133010-1

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Mar

icopa

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6X

X6200

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AZ

9040191011-1

AZ

Pim

a-1

10.8

732.2

1X

XX

X8520

Tusc

on,A

Z

45

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

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9060010003-1

CA

Ala

med

a-1

21.7

737.6

9X

XX

5775

Oak

land,CA

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Ala

med

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21.9

637.5

4X

XX

5775

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land,CA

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439.7

6X

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1620

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4X

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land,CA

9060130003-1

CA

Contr

aCost

a-1

22.3

637.9

5X

X5775

Oak

land,CA

9060131002-1

CA

Contr

aCost

a-1

21.6

438.0

1X

XX

5775

Oak

land,CA

9060131003-1

CA

Contr

aCost

a-1

22.3

437.9

6X

5775

Oak

land,CA

9060133001-1

CA

Contr

aCost

a-1

21.9

038.0

3X

XX

5775

Oak

land,CA

9060170011-1

CA

ElD

orad

o-1

19.9

738.9

5X

XX

6920

Sac

ram

ento

,CA

9060190007-1

CA

Fre

sno

-119.7

436.7

1X

XX

2840

Fre

sno,CA

9060190008-1

CA

Fre

sno

-119.7

736.7

8X

XX

2840

Fre

sno,CA

9060190242-1

CA

Fre

sno

-119.8

736.8

4X

XX

2840

Fre

sno,CA

9060194001-1

CA

Fre

sno

-119.5

036.6

0X

XX

2840

Fre

sno,CA

9060195001-1

CA

Fre

sno

-119.7

236.8

2X

XX

2840

Fre

sno,CA

9060250005-1

CA

Imper

ial

-115.4

832.6

8X

XX

X-

(not

inan

MSA

)9

060250006-1

CA

Imper

ial

-115.3

932.6

8X

X-

(not

inan

MSA

)9

060290007-1

CA

Ker

n-1

18.8

535.3

5X

XX

X0680

Bak

ersfi

eld,CA

9060290010-1

CA

Ker

n-1

19.0

135.3

9X

XX

X0680

Bak

ersfi

eld,CA

9060290011-1

CA

Ker

n-1

18.1

535.0

5X

0680

Bak

ersfi

eld,CA

9060290014-1

CA

Ker

n-1

19.0

435.3

6X

XX

X0680

Bak

ersfi

eld,CA

9060290232-1

CA

Ker

n-1

19.0

235.4

4X

XX

X0680

Bak

ersfi

eld,CA

9060295001-1

CA

Ker

n-1

18.7

835.2

1X

XX

X0680

Bak

ersfi

eld,CA

9060296001-1

CA

Ker

n-1

19.2

735.5

0X

XX

X0680

Bak

ersfi

eld,CA

9060311004-1

CA

Kin

gs

-119.6

436.3

1X

XX

X-

(not

inan

MSA

)9

060370002-2

CA

Los

Angel

es-1

17.9

234.1

4X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060370016-1

CA

Los

Angel

es-1

17.8

534.1

4X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060370113-1

CA

Los

Angel

es-1

18.4

634.0

5X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060371002-2

CA

Los

Angel

es-1

18.3

234.1

8X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060371103-1

CA

Los

Angel

es-1

18.2

434.0

7X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060371201-2

CA

Los

Angel

es-1

18.5

334.2

0X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060371301-2

CA

Los

Angel

es-1

18.2

133.9

3X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060371601-2

CA

Los

Angel

es-1

18.0

634.0

1X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

46

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

9060371701-2

CA

Los

Angel

es-1

17.7

534.0

7X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060372005-1

CA

Los

Angel

es-1

18.1

134.0

8X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060374002-2

CA

Los

Angel

es-1

18.1

933.8

2X

XX

4480

Los

Angel

es-L

ong

Bea

ch,CA

9060375001-1

CA

Los

Angel

es-1

18.3

733.9

3X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060379002-1

CA

Los

Angel

es-1

18.1

334.6

9X

XX

X4480

Los

Angel

es-L

ong

Bea

ch,CA

9060410001-1

CA

Mar

in-1

22.5

237.9

7X

XX

7360

San

Fra

nci

sco,CA

9060450008-1

CA

Men

doci

no

-123.2

039.1

5X

X-

(not

inan

MSA

)9

060450009-1

CA

Men

doci

no

-123.3

539.4

0X

X-

(not

inan

MSA

)9

060470003-1

CA

Mer

ced

-120.4

337.2

8X

XX

4940

Mer

ced,CA

9060531002-2

CA

Monte

rey

-121.6

336.7

0X

XX

X7120

Sal

inas

,CA

9060550003-1

CA

Nap

a-1

22.2

938.3

1X

XX

8720

Val

lejo

-Fai

rfiel

d-N

apa,

CA

9060590001-5

CA

Ora

nge

-117.9

133.8

2X

XX

X5945

Ora

nge

County

,CA

9060591003-1

CA

Ora

nge

-117.9

333.6

7X

XX

X5945

Ora

nge

County

,CA

9060595001-2

CA

Ora

nge

-117.9

533.9

3X

XX

X5945

Ora

nge

County

,CA

9060610006-1

CA

Pla

cer

-121.2

738.7

5X

XX

6920

Sac

ram

ento

,CA

9060655001-2

CA

Riv

erside

-116.5

433.8

6X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060658001-2

CA

Riv

erside

-117.4

334.0

1X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060659001-1

CA

Riv

erside

-117.3

433.6

8X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060670002-1

CA

Sac

ram

ento

-121.3

838.7

1X

X6920

Sac

ram

ento

,CA

9060670006-1

CA

Sac

ram

ento

-121.3

738.6

1X

X6920

Sac

ram

ento

,CA

9060670010-1

CA

Sac

ram

ento

-121.4

938.5

6X

XX

6920

Sac

ram

ento

,CA

9060670011-1

CA

Sac

ram

ento

-121.4

238.3

0X

X6920

Sac

ram

ento

,CA

9060670012-1

CA

Sac

ram

ento

-121.1

638.6

8X

6920

Sac

ram

ento

,CA

9060675002-1

CA

Sac

ram

ento

-121.5

938.7

2X

X6920

Sac

ram

ento

,CA

9060710001-1

CA

San

Ber

nar

din

o-1

17.0

234.9

0X

XX

6780

Riv

erside-

San

Ber

nar

din

o,CA

9060710012-1

CA

San

Ber

nar

din

o-1

17.5

634.4

3X

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060710014-1

CA

San

Ber

nar

din

o-1

17.3

334.5

1X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060710015-1

CA

San

Ber

nar

din

o-1

17.3

735.7

8X

6780

Riv

erside-

San

Ber

nar

din

o,CA

9060710017-1

CA

San

Ber

nar

din

o-1

16.0

634.1

4X

XX

6780

Riv

erside-

San

Ber

nar

din

o,CA

9060711004-2

CA

San

Ber

nar

din

o-1

17.6

734.1

0X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060712002-1

CA

San

Ber

nar

din

o-1

17.5

134.1

0X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060714001-1

CA

San

Ber

nar

din

o-1

17.2

834.4

2X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

47

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

9060719004-1

CA

San

Ber

nar

din

o-1

17.2

734.1

1X

XX

X6780

Riv

erside-

San

Ber

nar

din

o,CA

9060730001-1

CA

San

Die

go

-117.0

632.6

2X

XX

X7320

San

Die

go,CA

9060730003-1

CA

San

Die

go

-116.9

432.7

9X

XX

X7320

San

Die

go,CA

9060730005-1

CA

San

Die

go

-117.3

733.2

0X

XX

X7320

San

Die

go,CA

9060730006-1

CA

San

Die

go

-117.1

332.8

3X

XX

X7320

San

Die

go,CA

9060731002-1

CA

San

Die

go

-117.0

733.1

3X

XX

X7320

San

Die

go,CA

9060731006-1

CA

San

Die

go

-116.7

532.8

3X

X7320

San

Die

go,CA

9060731007-1

CA

San

Die

go

-117.1

532.7

1X

XX

X7320

San

Die

go,CA

9060731008-1

CA

San

Die

go

-117.4

033.2

2X

X7320

San

Die

go,CA

9060732007-1

CA

San

Die

go

-116.9

432.5

8X

XX

X7320

San

Die

go,CA

9060750005-1

CA

San

Fra

nci

sco

-122.3

937.7

6X

XX

X7360

San

Fra

nci

sco,CA

9060771002-2

CA

San

Joaq

uin

-121.2

737.9

5X

XX

8120

Sto

ckto

n-L

odi,

CA

9060773003-1

CA

San

Joaq

uin

-121.5

337.7

4X

XX

8120

Sto

ckto

n-L

odi,

CA

9060792002-1

CA

San

Luis

Obispo

-120.6

535.2

8X

XX

X7460

San

Luis

Obispo-A

tasc

ader

o-P

aso

Roble

s,CA

9060798001-1

CA

San

Luis

Obispo

-120.6

735.4

9X

XX

X7460

San

Luis

Obispo-A

tasc

ader

o-P

aso

Roble

s,CA

9060811001-1

CA

San

Mat

eo-1

22.2

037.4

8X

XX

X7360

San

Fra

nci

sco,CA

9060830008-1

CA

San

taB

arbar

a-1

20.0

234.4

6X

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060830010-1

CA

San

taB

arbar

a-1

19.7

034.4

2X

XX

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831007-1

CA

San

taB

arbar

a-1

20.4

334.9

5X

XX

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831015-1

CA

San

taB

arbar

a-1

20.2

134.4

8X

7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831018-1

CA

San

taB

arbar

a-1

20.2

034.5

3X

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831021-1

CA

San

taB

arbar

a-1

19.4

634.4

0X

XX

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831026-1

CA

San

taB

arbar

a-1

20.0

334.4

8X

7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060831027-1

CA

San

taB

arbar

a-1

20.0

434.4

7X

7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060832004-1

CA

San

taB

arbar

a-1

20.4

634.6

4X

XX

7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060832011-1

CA

San

taB

arbar

a-1

19.8

334.4

5X

XX

X7480

San

taB

arbar

a-San

taM

aria

-Lom

poc,

CA

9060850004-1

CA

San

taCla

ra-1

21.8

937.3

4X

XX

X7400

San

Jose

,CA

9060950004-1

CA

Sola

no

-122.2

438.1

0X

XX

8720

Val

lejo

-Fai

rfiel

d-N

apa,

CA

9060970003-1

CA

Sonom

a-1

22.7

138.4

5X

XX

X7500

San

taRosa

,CA

9060990005-1

CA

Sta

nisla

us

-120.9

937.6

4X

XX

5170

Modes

to,CA

9060990006-1

CA

Sta

nisla

us

-120.8

437.4

9X

XX

5170

Modes

to,CA

9061010003-1

CA

Sutt

er-1

21.6

239.1

4X

XX

9340

Yuba

City,

CA

48

Tab

le1:

Continued

.

Reg

ion

Sta

tion

IDSta

teCounty

Lon

Lat

FW

Sp

Su

MSA

MSA

Des

crip

tion

9061072002-1

CA

Tula

re-1

19.2

936.3

3X

XX

X8780

Visal

ia-T

ula

re-P

orte

rvill

e,CA

9061110005-1

CA

Ven

tura

-119.4

234.3

9X

XX

8735

Ven

tura

,CA

9061110007-1

CA

Ven

tura

-118.8

734.2

1X

XX

X8735

Ven

tura

,CA

9061111004-1

CA

Ven

tura

-119.2

334.4

5X

XX

8735

Ven

tura

,CA

9061112002-1

CA

Ven

tura

-118.6

834.2

8X

XX

X8735

Ven

tura

,CA

9061112003-1

CA

Ven

tura

-119.3

134.2

9X

XX

8735

Ven

tura

,CA

9061113001-1

CA

Ven

tura

-119.1

434.2

5X

XX

8735

Ven

tura

,CA

9061130004-1

CA

Yolo

-121.7

838.5

3X

X9270

Yolo

,CA

9320030557-1

NV

Cla

rk-1

15.1

136.1

6X

X4120

Las

Veg

as,N

V-A

Z9

320050004-1

NV

Dougla

s-1

19.9

438.9

6X

-(n

ot

inan

MSA

)9

325100004-1

NV

Car

son

City

-119.7

639.1

7X

X-

(not

inan

MSA

)10

160010016-1

IDA

da

-116.2

143.6

2X

XX

1080

Boise

City,

ID10

160050015-1

IDB

annock

-112.4

642.8

8X

6340

Poca

tello

,ID

10

410510080-1

OR

Multnom

ah-1

22.6

045.5

0X

6440

Por

tlan

d-V

anco

uve

r,O

R-W

A10

530110011-1

WA

Cla

rk-1

22.5

245.6

2X

6440

Por

tlan

d-V

anco

uve

r,O

R-W

A10

530330080-1

WA

Kin

g-1

22.3

147.5

7X

7600

Sea

ttle

-Bel

levu

e-Eve

rett

,W

A

49

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CT

Fai

rfie

ldB

RID

GE

PO

RT

, CT

id=

0900

1011

3-1

(1-h

r)C

orre

latio

n=0.

61N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

CT

Fai

rfie

ldB

RID

GE

PO

RT

, CT

id=

0900

1011

3-1

(1-h

r)C

orre

latio

n=0.

49N

poss

=20

NG

OM

E=

20N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CT

Fai

rfie

ldB

RID

GE

PO

RT

, CT

id=

0900

1011

3-1

(1-h

r)C

orre

latio

n=0.

54N

poss

=15

NG

OM

E=

15N

corr=

10

50

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CT

Fai

rfie

ldB

RID

GE

PO

RT

, CT

id=

0900

1900

3-1

(1-h

r)C

orre

latio

n=0.

76N

poss

=14

NG

OM

E=

14N

corr=

11

51

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CT

Har

tford

HA

RT

FO

RD

, CT

id=

0900

3100

3-1

(1-h

r)C

orre

latio

n=0.

64N

poss

=22

NG

OM

E=

22N

corr=

17

52

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CT

New

_Hav

enB

RID

GE

PO

RT

, CT

id=

0900

9112

3-1

(1-h

r)C

orre

latio

n=0.

10N

poss

=16

NG

OM

E=

16N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

CT

New

_Hav

enB

RID

GE

PO

RT

, CT

id=

0900

9112

3-1

(1-h

r)C

orre

latio

n=0.

76N

poss

=20

NG

OM

E=

20N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CT

New

_Hav

enB

RID

GE

PO

RT

, CT

id=

0900

9112

3-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=18

NG

OM

E=

18N

corr=

15

53

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

ME

Yor

kN

OT

IN A

N M

SA

id=

2303

1300

2-1

(1-h

r)C

orre

latio

n=0.

17N

poss

=20

NG

OM

E=

16N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

ME

Yor

kN

OT

IN A

N M

SA

id=

2303

1300

2-1

(1-h

r)C

orre

latio

n=0.

13N

poss

=19

NG

OM

E=

19N

corr=

10

54

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Bris

tol

PR

OV

IDE

NC

E-F

ALL

RIV

ER

-WA

RW

ICK

, RI-

MA

id=

2500

5100

5-1

(1-h

r)C

orre

latio

n=-0

.20

Npo

ss=

19 N

GO

ME=

19N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

55

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ess

exB

OS

TO

N, M

A-N

Hid

=25

0092

006-

1(1

-hr)

Cor

rela

tion=

0.33

Npo

ss=

18 N

GO

ME=

18N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ess

exB

OS

TO

N, M

A-N

Hid

=25

0092

006-

1(1

-hr)

Cor

rela

tion=

-0.0

6N

poss

=16

NG

OM

E=

16N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ess

exB

OS

TO

N, M

A-N

Hid

=25

0092

006-

1(1

-hr)

Cor

rela

tion=

0.05

Npo

ss=

21 N

GO

ME=

21N

corr=

19

56

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ham

pden

SP

RIN

GF

IELD

, MA

id=

2501

3000

8-1

(1-h

r)C

orre

latio

n=-0

.16

Npo

ss=

17 N

GO

ME=

17N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

57

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ham

pden

SP

RIN

GF

IELD

, MA

id=

2501

3001

6-1

(1-h

r)C

orre

latio

n=0.

13N

poss

=14

NG

OM

E=

14N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ham

pden

SP

RIN

GF

IELD

, MA

id=

2501

3001

6-1

(1-h

r)C

orre

latio

n=0.

65N

poss

=14

NG

OM

E=

14N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Ham

pden

SP

RIN

GF

IELD

, MA

id=

2501

3001

6-1

(1-h

r)C

orre

latio

n=0.

82N

poss

=18

NG

OM

E=

18N

corr=

13

58

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5000

2-1

(1-h

r)C

orre

latio

n=0.

50N

poss

=19

NG

OM

E=

19N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5000

2-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=16

NG

OM

E=

16N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5000

2-1

(1-h

r)C

orre

latio

n=0.

30N

poss

=20

NG

OM

E=

20N

corr=

18

59

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5002

1-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=18

NG

OM

E=

18N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5002

1-1

(1-h

r)C

orre

latio

n=0.

33N

poss

=16

NG

OM

E=

16N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5002

1-1

(1-h

r)C

orre

latio

n=0.

20N

poss

=20

NG

OM

E=

20N

corr=

16

60

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5004

0-1

(1-h

r)C

orre

latio

n=0.

30N

poss

=20

NG

OM

E=

20N

corr=

18

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5004

0-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=17

NG

OM

E=

17N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5004

0-1

(1-h

r)C

orre

latio

n=0.

15N

poss

=21

NG

OM

E=

21N

corr=

17

61

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5100

3-1

(1-h

r)C

orre

latio

n=0.

36N

poss

=20

NG

OM

E=

20N

corr=

20

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5100

3-1

(1-h

r)C

orre

latio

n=0.

22N

poss

=17

NG

OM

E=

17N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Suf

folk

BO

ST

ON

, MA

-NH

id=

2502

5100

3-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=19

NG

OM

E=

19N

corr=

15

62

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Wor

cest

erN

OT

IN A

N M

SA

id=

2502

7002

0-1

(1-h

r)C

orre

latio

n=-0

.02

Npo

ss=

17 N

GO

ME=

17N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Wor

cest

erN

OT

IN A

N M

SA

id=

2502

7002

0-1

(1-h

r)C

orre

latio

n=0.

22N

poss

=14

NG

OM

E=

14N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MA

Wor

cest

erN

OT

IN A

N M

SA

id=

2502

7002

0-1

(1-h

r)C

orre

latio

n=0.

32N

poss

=20

NG

OM

E=

20N

corr=

17

63

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NH

Hill

sbor

ough

NA

SH

UA

, NH

id=

3301

1001

6-1

(1-h

r)C

orre

latio

n=0.

56N

poss

=19

NG

OM

E=

15N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NH

Hill

sbor

ough

NA

SH

UA

, NH

id=

3301

1001

6-1

(1-h

r)C

orre

latio

n=0.

47N

poss

=17

NG

OM

E=

17N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NH

Hill

sbor

ough

NA

SH

UA

, NH

id=

3301

1001

6-1

(1-h

r)C

orre

latio

n=0.

10N

poss

=17

NG

OM

E=

17N

corr=

13

64

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NH

Roc

king

ham

PO

RT

SM

OU

TH

-RO

CH

ES

TE

R, N

H-M

Eid

=33

0150

009-

1(1

-hr)

Cor

rela

tion=

0.16

Npo

ss=

19 N

GO

ME=

15N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NH

Roc

king

ham

PO

RT

SM

OU

TH

-RO

CH

ES

TE

R, N

H-M

Eid

=33

0150

009-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

19 N

GO

ME=

19N

corr=

16

65

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

RI P

rovi

denc

eP

RO

VID

EN

CE

-FA

LL R

IVE

R-W

AR

WIC

K, R

I-M

Aid

=44

0070

012-

2(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

16 N

GO

ME=

16N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

RI P

rovi

denc

eP

RO

VID

EN

CE

-FA

LL R

IVE

R-W

AR

WIC

K, R

I-M

Aid

=44

0070

012-

2(1

-hr)

Cor

rela

tion=

-0.0

9N

poss

=16

NG

OM

E=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

RI P

rovi

denc

eP

RO

VID

EN

CE

-FA

LL R

IVE

R-W

AR

WIC

K, R

I-M

Aid

=44

0070

012-

2(1

-hr)

Cor

rela

tion=

0.40

Npo

ss=

16 N

GO

ME=

16N

corr=

12

66

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

RI P

rovi

denc

eP

RO

VID

EN

CE

-FA

LL R

IVE

R-W

AR

WIC

K, R

I-M

Aid

=44

0071

010-

1(1

-hr)

Cor

rela

tion=

0.48

Npo

ss=

17 N

GO

ME=

17N

corr=

11

67

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

VT

Chi

ttend

enB

UR

LIN

GT

ON

, VT

id=

5000

7000

3-1

(1-h

r)C

orre

latio

n=0.

43N

poss

=17

NG

OM

E=

16N

corr=

12

68

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Ber

gen

BE

RG

EN

-PA

SS

AIC

, NJ

id=

3400

3000

1-1

(1-h

r)C

orre

latio

n=0.

33N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Ber

gen

BE

RG

EN

-PA

SS

AIC

, NJ

id=

3400

3000

1-1

(1-h

r)C

orre

latio

n=0.

47N

poss

=21

NG

OM

E=

21N

corr=

20

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Ber

gen

BE

RG

EN

-PA

SS

AIC

, NJ

id=

3400

3000

1-1

(1-h

r)C

orre

latio

n=0.

38N

poss

=14

NG

OM

E=

14N

corr=

13

69

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Cam

den

PH

ILA

DE

LPH

IA, P

A-N

Jid

=34

0070

003-

2(1

-hr)

Cor

rela

tion=

0.43

Npo

ss=

12 N

GO

ME=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Cam

den

PH

ILA

DE

LPH

IA, P

A-N

Jid

=34

0070

003-

2(1

-hr)

Cor

rela

tion=

0.69

Npo

ss=

21 N

GO

ME=

21N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NJ

Cam

den

PH

ILA

DE

LPH

IA, P

A-N

Jid

=34

0070

003-

2(1

-hr)

Cor

rela

tion=

0.50

Npo

ss=

20 N

GO

ME=

20N

corr=

12

70

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0130

011-

1(1

-hr)

Cor

rela

tion=

0.26

Npo

ss=

15 N

GO

ME=

15N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0130

011-

1(1

-hr)

Cor

rela

tion=

0.65

Npo

ss=

21 N

GO

ME=

21N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0130

011-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

21 N

GO

ME=

21N

corr=

21

71

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0131

003-

1(1

-hr)

Cor

rela

tion=

0.26

Npo

ss=

14 N

GO

ME=

14N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0131

003-

1(1

-hr)

Cor

rela

tion=

0.44

Npo

ss=

21 N

GO

ME=

21N

corr=

20

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NJ

Ess

exN

EW

AR

K, N

Jid

=34

0131

003-

1(1

-hr)

Cor

rela

tion=

0.32

Npo

ss=

20 N

GO

ME=

20N

corr=

14

72

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Hud

son

JER

SE

Y C

ITY

, NJ

id=

3401

7000

6-1

(1-h

r)C

orre

latio

n=-0

.38

Npo

ss=

14 N

GO

ME=

14N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Hud

son

JER

SE

Y C

ITY

, NJ

id=

3401

7000

6-1

(1-h

r)C

orre

latio

n=0.

55N

poss

=20

NG

OM

E=

20N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NJ

Hud

son

JER

SE

Y C

ITY

, NJ

id=

3401

7000

6-1

(1-h

r)C

orre

latio

n=-0

.12

Npo

ss=

16 N

GO

ME=

16N

corr=

12

73

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NJ

Mer

cer

TR

EN

TO

N, N

Jid

=34

0210

005-

1(1

-hr)

Cor

rela

tion=

0.16

Npo

ss=

13 N

GO

ME=

12N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Mer

cer

TR

EN

TO

N, N

Jid

=34

0210

005-

1(1

-hr)

Cor

rela

tion=

0.36

Npo

ss=

20 N

GO

ME=

20N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

74

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Mid

dles

exM

IDD

LES

EX

-SO

ME

RS

ET

-HU

NT

ER

DO

N, N

Jid

=34

0230

011-

1(1

-hr)

Cor

rela

tion=

0.10

Npo

ss=

16 N

GO

ME=

16N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Mid

dles

exM

IDD

LES

EX

-SO

ME

RS

ET

-HU

NT

ER

DO

N, N

Jid

=34

0230

011-

1(1

-hr)

Cor

rela

tion=

0.10

Npo

ss=

21 N

GO

ME=

21N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Mid

dles

exM

IDD

LES

EX

-SO

ME

RS

ET

-HU

NT

ER

DO

N, N

Jid

=34

0230

011-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

20 N

GO

ME=

20N

corr=

14

75

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

004-

2(1

-hr)

Cor

rela

tion=

-0.1

9N

poss

=16

NG

OM

E=

16N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

004-

2(1

-hr)

Cor

rela

tion=

0.35

Npo

ss=

20 N

GO

ME=

20N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

004-

2(1

-hr)

Cor

rela

tion=

0.35

Npo

ss=

20 N

GO

ME=

20N

corr=

18

76

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

008-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

15 N

GO

ME=

15N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

008-

1(1

-hr)

Cor

rela

tion=

0.35

Npo

ss=

11 N

GO

ME=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

008-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

22 N

GO

ME=

22N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NJ

Uni

onN

EW

AR

K, N

Jid

=34

0390

008-

1(1

-hr)

Cor

rela

tion=

-0.1

7N

poss

=19

NG

OM

E=

19N

corr=

16

77

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Alb

any

ALB

AN

Y-S

CH

EN

EC

TA

DY

-TR

OY

, NY

id=

3600

1001

2-1

(1-h

r)C

orre

latio

n=0.

66N

poss

=16

NG

OM

E=

16N

corr=

10

78

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Bro

nxN

EW

YO

RK

, NY

id=

3600

5008

0-1

(1-h

r)C

orre

latio

n=0.

49N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NY

Bro

nxN

EW

YO

RK

, NY

id=

3600

5008

0-1

(1-h

r)C

orre

latio

n=0.

70N

poss

=22

NG

OM

E=

22N

corr=

21

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

NY

Bro

nxN

EW

YO

RK

, NY

id=

3600

5008

0-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=16

NG

OM

E=

16N

corr=

15

79

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

NY

Bro

nxN

EW

YO

RK

, NY

id=

3600

5008

3-1

(1-h

r)C

orre

latio

n=0.

64N

poss

=21

NG

OM

E=

21N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

Bro

nxN

EW

YO

RK

, NY

id=

3600

5008

3-1

(1-h

r)C

orre

latio

n=0.

48N

poss

=17

NG

OM

E=

17N

corr=

15

80

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Erie

BU

FF

ALO

-NIA

GA

RA

FA

LLS

, NY

id=

3602

9000

2-1

(1-h

r)C

orre

latio

n=0.

84N

poss

=12

NG

OM

E=

12N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Erie

BU

FF

ALO

-NIA

GA

RA

FA

LLS

, NY

id=

3602

9000

2-1

(1-h

r)C

orre

latio

n=0.

14N

poss

=18

NG

OM

E=

18N

corr=

17

81

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Erie

BU

FF

ALO

-NIA

GA

RA

FA

LLS

, NY

id=

3602

9000

5-3

(1-h

r)C

orre

latio

n=0.

52N

poss

=11

NG

OM

E=

11N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NY

Erie

BU

FF

ALO

-NIA

GA

RA

FA

LLS

, NY

id=

3602

9000

5-3

(1-h

r)C

orre

latio

n=-0

.16

Npo

ss=

17 N

GO

ME=

17N

corr=

17

82

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

Nas

sau

NA

SS

AU

-SU

FF

OLK

, NY

id=

3605

9000

5-2

(1-h

r)C

orre

latio

n=0.

50N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NY

Nas

sau

NA

SS

AU

-SU

FF

OLK

, NY

id=

3605

9000

5-2

(1-h

r)C

orre

latio

n=0.

49N

poss

=24

NG

OM

E=

24N

corr=

24

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

Nas

sau

NA

SS

AU

-SU

FF

OLK

, NY

id=

3605

9000

5-2

(1-h

r)C

orre

latio

n=0.

25N

poss

=17

NG

OM

E=

17N

corr=

12

83

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

New

_Yor

kN

EW

YO

RK

, NY

id=

3606

1001

0-1

(1-h

r)C

orre

latio

n=0.

01N

poss

=13

NG

OM

E=

13N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NY

New

_Yor

kN

EW

YO

RK

, NY

id=

3606

1001

0-1

(1-h

r)C

orre

latio

n=0.

69N

poss

=21

NG

OM

E=

21N

corr=

18

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

84

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

New

_Yor

kN

EW

YO

RK

, NY

id=

3606

1005

6-1

(1-h

r)C

orre

latio

n=0.

44N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

NY

New

_Yor

kN

EW

YO

RK

, NY

id=

3606

1005

6-1

(1-h

r)C

orre

latio

n=0.

81N

poss

=22

NG

OM

E=

22N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NY

New

_Yor

kN

EW

YO

RK

, NY

id=

3606

1005

6-1

(1-h

r)C

orre

latio

n=0.

73N

poss

=15

NG

OM

E=

15N

corr=

12

85

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

DE

New

_Cas

tleW

ILM

ING

TO

N-N

EW

AR

K, D

E-M

Did

=10

0031

003-

1(1

-hr)

Cor

rela

tion=

0.25

Npo

ss=

19 N

GO

ME=

19N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

DE

New

_Cas

tleW

ILM

ING

TO

N-N

EW

AR

K, D

E-M

Did

=10

0031

003-

1(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

24 N

GO

ME=

24N

corr=

19

86

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

025-

1(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

12 N

GO

ME=

12N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

025-

1(1

-hr)

Cor

rela

tion=

-0.0

3N

poss

=12

NG

OM

E=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

025-

1(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

16 N

GO

ME=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

025-

1(1

-hr)

Cor

rela

tion=

0.07

Npo

ss=

21 N

GO

ME=

21N

corr=

19

87

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

041-

1(1

-hr)

Cor

rela

tion=

0.15

Npo

ss=

13 N

GO

ME=

13N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

041-

1(1

-hr)

Cor

rela

tion=

0.52

Npo

ss=

12 N

GO

ME=

12N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

041-

1(1

-hr)

Cor

rela

tion=

-0.1

5N

poss

=14

NG

OM

E=

14N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

041-

1(1

-hr)

Cor

rela

tion=

0.35

Npo

ss=

20 N

GO

ME=

20N

corr=

19

88

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

DC

Dis

tric

t_of

_Col

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=11

0010

043-

1(1

-hr)

Cor

rela

tion=

-0.2

4N

poss

=19

NG

OM

E=

19N

corr=

12

89

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MD

Ann

e_A

rund

elB

ALT

IMO

RE

, MD

id=

2400

3001

9-3

(1-h

r)C

orre

latio

n=-0

.02

Npo

ss=

23 N

GO

ME=

23N

corr=

16

90

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

eB

ALT

IMO

RE

, MD

id=

2400

5300

1-2

(1-h

r)C

orre

latio

n=0.

11N

poss

=26

NG

OM

E=

26N

corr=

18

91

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0004

0-1

(1-h

r)C

orre

latio

n=0.

14N

poss

=16

NG

OM

E=

16N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

200

Surface NO2 (ppbv)

0102030

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0004

0-1

(1-h

r)C

orre

latio

n=0.

21N

poss

=12

NG

OM

E=

12N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0004

0-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=18

NG

OM

E=

18N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0004

0-1

(1-h

r)C

orre

latio

n=-0

.01

Npo

ss=

25 N

GO

ME=

25N

corr=

24

92

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0005

0-1

(1-h

r)C

orre

latio

n=0.

66N

poss

=16

NG

OM

E=

16N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

93

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MD

Bal

timor

e_C

ityB

ALT

IMO

RE

, MD

id=

2451

0005

1-1

(1-h

r)C

orre

latio

n=0.

21N

poss

=23

NG

OM

E=

23N

corr=

20

94

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3000

8-1

(1-h

r)C

orre

latio

n=0.

16N

poss

=11

NG

OM

E=

11N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3000

8-1

(1-h

r)C

orre

latio

n=0.

26N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3000

8-1

(1-h

r)C

orre

latio

n=0.

58N

poss

=13

NG

OM

E=

13N

corr=

12

95

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

140

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3003

1-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=11

NG

OM

E=

11N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3003

1-1

(1-h

r)C

orre

latio

n=0.

15N

poss

=11

NG

OM

E=

11N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Alle

ghen

yP

ITT

SB

UR

GH

, PA

id=

4200

3003

1-1

(1-h

r)C

orre

latio

n=0.

32N

poss

=14

NG

OM

E=

14N

corr=

14

96

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Ber

ksR

EA

DIN

G, P

Aid

=42

0110

009-

1(1

-hr)

Cor

rela

tion=

0.43

Npo

ss=

13 N

GO

ME=

13N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Ber

ksR

EA

DIN

G, P

Aid

=42

0110

009-

1(1

-hr)

Cor

rela

tion=

0.23

Npo

ss=

20 N

GO

ME=

20N

corr=

20

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Ber

ksR

EA

DIN

G, P

Aid

=42

0110

009-

1(1

-hr)

Cor

rela

tion=

-0.1

8N

poss

=22

NG

OM

E=

22N

corr=

21

97

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Buc

ksP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4201

7001

2-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=14

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Buc

ksP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4201

7001

2-1

(1-h

r)C

orre

latio

n=0.

44N

poss

=20

NG

OM

E=

20N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Buc

ksP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4201

7001

2-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=20

NG

OM

E=

20N

corr=

19

98

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Cam

bria

JOH

NS

TO

WN

, PA

id=

4202

1001

1-1

(1-h

r)C

orre

latio

n=-0

.17

Npo

ss=

15 N

GO

ME=

15N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

99

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Dau

phin

HA

RR

ISB

UR

G-L

EB

AN

ON

-CA

RLI

SLE

, PA

id=

4204

3040

1-1

(1-h

r)C

orre

latio

n=0.

54N

poss

=12

NG

OM

E=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Dau

phin

HA

RR

ISB

UR

G-L

EB

AN

ON

-CA

RLI

SLE

, PA

id=

4204

3040

1-1

(1-h

r)C

orre

latio

n=0.

25N

poss

=15

NG

OM

E=

15N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Dau

phin

HA

RR

ISB

UR

G-L

EB

AN

ON

-CA

RLI

SLE

, PA

id=

4204

3040

1-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=19

NG

OM

E=

19N

corr=

13

100

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Del

awar

eP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4204

5000

2-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=20

NG

OM

E=

20N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Del

awar

eP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4204

5000

2-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=24

NG

OM

E=

24N

corr=

22

101

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Erie

ER

IE, P

Aid

=42

0490

003-

1(1

-hr)

Cor

rela

tion=

-0.2

9N

poss

=14

NG

OM

E=

14N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

102

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Lan

cast

erLA

NC

AS

TE

R, P

Aid

=42

0710

007-

1(1

-hr)

Cor

rela

tion=

0.38

Npo

ss=

12 N

GO

ME=

12N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Lan

cast

erLA

NC

AS

TE

R, P

Aid

=42

0710

007-

1(1

-hr)

Cor

rela

tion=

0.06

Npo

ss=

21 N

GO

ME=

21N

corr=

11

103

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Law

renc

eN

OT

IN A

N M

SA

id=

4207

3001

5-1

(1-h

r)C

orre

latio

n=0.

50N

poss

=13

NG

OM

E=

13N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Law

renc

eN

OT

IN A

N M

SA

id=

4207

3001

5-1

(1-h

r)C

orre

latio

n=0.

04N

poss

=12

NG

OM

E=

12N

corr=

11

104

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Leh

igh

ALL

EN

TO

WN

-BE

TH

LEH

EM

-EA

ST

ON

, PA

id=

4207

7000

4-1

(1-h

r)C

orre

latio

n=0.

09N

poss

=13

NG

OM

E=

13N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Leh

igh

ALL

EN

TO

WN

-BE

TH

LEH

EM

-EA

ST

ON

, PA

id=

4207

7000

4-1

(1-h

r)C

orre

latio

n=0.

51N

poss

=20

NG

OM

E=

20N

corr=

12

105

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Mon

tgom

ery

PH

ILA

DE

LPH

IA, P

A-N

Jid

=42

0910

013-

1(1

-hr)

Cor

rela

tion=

-0.0

5N

poss

=12

NG

OM

E=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Mon

tgom

ery

PH

ILA

DE

LPH

IA, P

A-N

Jid

=42

0910

013-

1(1

-hr)

Cor

rela

tion=

0.43

Npo

ss=

19 N

GO

ME=

19N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Mon

tgom

ery

PH

ILA

DE

LPH

IA, P

A-N

Jid

=42

0910

013-

1(1

-hr)

Cor

rela

tion=

-0.1

2N

poss

=20

NG

OM

E=

20N

corr=

12

106

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Per

ryH

AR

RIS

BU

RG

-LE

BA

NO

N-C

AR

LIS

LE, P

Aid

=42

0990

301-

1(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

14 N

GO

ME=

14N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

107

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1000

4-3

(1-h

r)C

orre

latio

n=0.

04N

poss

=12

NG

OM

E=

12N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1000

4-3

(1-h

r)C

orre

latio

n=0.

56N

poss

=16

NG

OM

E=

16N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1000

4-3

(1-h

r)C

orre

latio

n=0.

43N

poss

=19

NG

OM

E=

19N

corr=

17

108

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1002

9-2

(1-h

r)C

orre

latio

n=-0

.20

Npo

ss=

12 N

GO

ME=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1002

9-2

(1-h

r)C

orre

latio

n=0.

79N

poss

=18

NG

OM

E=

18N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1002

9-2

(1-h

r)C

orre

latio

n=0.

71N

poss

=20

NG

OM

E=

20N

corr=

19

109

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1004

7-1

(1-h

r)C

orre

latio

n=-0

.06

Npo

ss=

12 N

GO

ME=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1004

7-1

(1-h

r)C

orre

latio

n=0.

71N

poss

=20

NG

OM

E=

20N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Phi

lade

lphi

aP

HIL

AD

ELP

HIA

, PA

-NJ

id=

4210

1004

7-1

(1-h

r)C

orre

latio

n=0.

63N

poss

=20

NG

OM

E=

20N

corr=

19

110

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Was

hing

ton

PIT

TS

BU

RG

H, P

Aid

=42

1250

005-

1(1

-hr)

Cor

rela

tion=

0.31

Npo

ss=

11 N

GO

ME=

11N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Was

hing

ton

PIT

TS

BU

RG

H, P

Aid

=42

1250

005-

1(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

14 N

GO

ME=

14N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Was

hing

ton

PIT

TS

BU

RG

H, P

Aid

=42

1250

005-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

15 N

GO

ME=

15N

corr=

12

111

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Was

hing

ton

PIT

TS

BU

RG

H, P

Aid

=42

1250

200-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

15 N

GO

ME=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Was

hing

ton

PIT

TS

BU

RG

H, P

Aid

=42

1250

200-

1(1

-hr)

Cor

rela

tion=

0.59

Npo

ss=

18 N

GO

ME=

18N

corr=

17

112

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Yor

kY

OR

K, P

Aid

=42

1330

008-

1(1

-hr)

Cor

rela

tion=

0.51

Npo

ss=

13 N

GO

ME=

13N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

PA

Yor

kY

OR

K, P

Aid

=42

1330

008-

1(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

18 N

GO

ME=

18N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

PA

Yor

kY

OR

K, P

Aid

=42

1330

008-

1(1

-hr)

Cor

rela

tion=

0.33

Npo

ss=

21 N

GO

ME=

21N

corr=

17

113

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

VA

Arli

ngto

nW

AS

HIN

GT

ON

, DC

-MD

-VA

-WV

id=

5101

3002

0-1

(1-h

r)C

orre

latio

n=0.

34N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

VA

Arli

ngto

nW

AS

HIN

GT

ON

, DC

-MD

-VA

-WV

id=

5101

3002

0-1

(1-h

r)C

orre

latio

n=0.

16N

poss

=12

NG

OM

E=

12N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

VA

Arli

ngto

nW

AS

HIN

GT

ON

, DC

-MD

-VA

-WV

id=

5101

3002

0-1

(1-h

r)C

orre

latio

n=0.

22N

poss

=19

NG

OM

E=

19N

corr=

17

114

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

VA

Cha

rles_

City

RIC

HM

ON

D-P

ET

ER

SB

UR

G, V

Aid

=51

0360

002-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

20 N

GO

ME=

20N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

VA

Cha

rles_

City

RIC

HM

ON

D-P

ET

ER

SB

UR

G, V

Aid

=51

0360

002-

1(1

-hr)

Cor

rela

tion=

-0.2

8N

poss

=18

NG

OM

E=

18N

corr=

16

115

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

VA

Fai

rfax

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=51

0590

005-

1(1

-hr)

Cor

rela

tion=

0.46

Npo

ss=

13 N

GO

ME=

13N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

VA

Fai

rfax

WA

SH

ING

TO

N, D

C-M

D-V

A-W

Vid

=51

0590

005-

1(1

-hr)

Cor

rela

tion=

-0.0

9N

poss

=21

NG

OM

E=

21N

corr=

15

116

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AL

Mon

tgom

ery

MO

NT

GO

ME

RY

, AL

id=

0110

1100

2-1

(1-h

r)C

orre

latio

n=-0

.14

Npo

ss=

19 N

GO

ME=

19N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AL

Mon

tgom

ery

MO

NT

GO

ME

RY

, AL

id=

0110

1100

2-1

(1-h

r)C

orre

latio

n=-0

.30

Npo

ss=

19 N

GO

ME=

19N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

117

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AL

She

lby

BIR

MIN

GH

AM

, AL

id=

0111

7000

4-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=17

NG

OM

E=

17N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

118

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Dad

eM

IAM

I, F

Lid

=12

0250

027-

1(1

-hr)

Cor

rela

tion=

0.12

Npo

ss=

16 N

GO

ME=

15N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

119

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Dad

eM

IAM

I, F

Lid

=12

0254

002-

2(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

15 N

GO

ME=

15N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Dad

eM

IAM

I, F

Lid

=12

0254

002-

2(1

-hr)

Cor

rela

tion=

-0.0

3N

poss

=15

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Dad

eM

IAM

I, F

Lid

=12

0254

002-

2(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

20 N

GO

ME=

16N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Dad

eM

IAM

I, F

Lid

=12

0254

002-

2(1

-hr)

Cor

rela

tion=

0.59

Npo

ss=

15 N

GO

ME=

15N

corr=

12

120

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Duv

alJA

CK

SO

NV

ILLE

, FL

id=

1203

1003

2-2

(1-h

r)C

orre

latio

n=0.

12N

poss

=20

NG

OM

E=

20N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Duv

alJA

CK

SO

NV

ILLE

, FL

id=

1203

1003

2-2

(1-h

r)C

orre

latio

n=-0

.04

Npo

ss=

20 N

GO

ME=

19N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Duv

alJA

CK

SO

NV

ILLE

, FL

id=

1203

1003

2-2

(1-h

r)C

orre

latio

n=0.

01N

poss

=17

NG

OM

E=

17N

corr=

11

121

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Ora

nge

OR

LAN

DO

, FL

id=

1209

5200

2-1

(1-h

r)C

orre

latio

n=-0

.04

Npo

ss=

19 N

GO

ME=

18N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Ora

nge

OR

LAN

DO

, FL

id=

1209

5200

2-1

(1-h

r)C

orre

latio

n=0.

07N

poss

=17

NG

OM

E=

17N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Ora

nge

OR

LAN

DO

, FL

id=

1209

5200

2-1

(1-h

r)C

orre

latio

n=-0

.33

Npo

ss=

15 N

GO

ME=

15N

corr=

10

122

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Pal

m_B

each

WE

ST

PA

LM B

EA

CH

-BO

CA

RA

TO

N, F

Lid

=12

0991

004-

1(1

-hr)

Cor

rela

tion=

0.40

Npo

ss=

15 N

GO

ME=

13N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Pal

m_B

each

WE

ST

PA

LM B

EA

CH

-BO

CA

RA

TO

N, F

Lid

=12

0991

004-

1(1

-hr)

Cor

rela

tion=

0.22

Npo

ss=

11 N

GO

ME=

11N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Pal

m_B

each

WE

ST

PA

LM B

EA

CH

-BO

CA

RA

TO

N, F

Lid

=12

0991

004-

1(1

-hr)

Cor

rela

tion=

-0.0

1N

poss

=24

NG

OM

E=

18N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Pal

m_B

each

WE

ST

PA

LM B

EA

CH

-BO

CA

RA

TO

N, F

Lid

=12

0991

004-

1(1

-hr)

Cor

rela

tion=

0.13

Npo

ss=

19 N

GO

ME=

19N

corr=

17

123

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

FL

Pin

ella

sT

AM

PA

-ST

. PE

TE

RS

BU

RG

-CLE

AR

WA

TE

R, F

Lid

=12

1030

018-

1(1

-hr)

Cor

rela

tion=

0.64

Npo

ss=

21 N

GO

ME=

21N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

124

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

GA

DeK

alb

AT

LAN

TA

, GA

id=

1308

9000

2-1

(1-h

r)C

orre

latio

n=0.

87N

poss

=16

NG

OM

E=

16N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

GA

DeK

alb

AT

LAN

TA

, GA

id=

1308

9000

2-1

(1-h

r)C

orre

latio

n=0.

29N

poss

=20

NG

OM

E=

20N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

125

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

GA

DeK

alb

AT

LAN

TA

, GA

id=

1308

9300

1-1

(1-h

r)C

orre

latio

n=-0

.07

Npo

ss=

21 N

GO

ME=

21N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

126

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

GA

Ful

ton

AT

LAN

TA

, GA

id=

1312

1004

8-1

(1-h

r)C

orre

latio

n=0.

74N

poss

=17

NG

OM

E=

17N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

GA

Ful

ton

AT

LAN

TA

, GA

id=

1312

1004

8-1

(1-h

r)C

orre

latio

n=0.

26N

poss

=19

NG

OM

E=

19N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

GA

Ful

ton

AT

LAN

TA

, GA

id=

1312

1004

8-1

(1-h

r)C

orre

latio

n=0.

52N

poss

=16

NG

OM

E=

16N

corr=

10

127

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

KY

Boy

dH

UN

TIN

GT

ON

-AS

HLA

ND

, WV

-KY

-OH

id=

2101

9001

5-1

(1-h

r)C

orre

latio

n=0.

65N

poss

=11

NG

OM

E=

11N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

128

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Bul

litt

LOU

ISV

ILLE

, KY

-IN

id=

2102

9000

6-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=14

NG

OM

E=

14N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

129

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

KY

Cam

pbel

lC

INC

INN

AT

I, O

H-K

Y-I

Nid

=21

0371

001-

1(1

-hr)

Cor

rela

tion=

0.65

Npo

ss=

12 N

GO

ME=

12N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

KY

Cam

pbel

lC

INC

INN

AT

I, O

H-K

Y-I

Nid

=21

0371

001-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

16 N

GO

ME=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

130

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Dav

iess

OW

EN

SB

OR

O, K

Yid

=21

0590

005-

1(1

-hr)

Cor

rela

tion=

-0.0

1N

poss

=15

NG

OM

E=

15N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Dav

iess

OW

EN

SB

OR

O, K

Yid

=21

0590

005-

1(1

-hr)

Cor

rela

tion=

0.01

Npo

ss=

14 N

GO

ME=

14N

corr=

11

131

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Fay

ette

LEX

ING

TO

N, K

Yid

=21

0670

012-

1(1

-hr)

Cor

rela

tion=

-0.4

4N

poss

=15

NG

OM

E=

15N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Fay

ette

LEX

ING

TO

N, K

Yid

=21

0670

012-

1(1

-hr)

Cor

rela

tion=

0.70

Npo

ss=

17 N

GO

ME=

17N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

132

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Hen

ders

onE

VA

NS

VIL

LE-H

EN

DE

RS

ON

, IN

-KY

id=

2110

1001

3-1

(1-h

r)C

orre

latio

n=0.

25N

poss

=12

NG

OM

E=

12N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Hen

ders

onE

VA

NS

VIL

LE-H

EN

DE

RS

ON

, IN

-KY

id=

2110

1001

3-1

(1-h

r)C

orre

latio

n=0.

38N

poss

=13

NG

OM

E=

13N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Hen

ders

onE

VA

NS

VIL

LE-H

EN

DE

RS

ON

, IN

-KY

id=

2110

1001

3-1

(1-h

r)C

orre

latio

n=0.

86N

poss

=15

NG

OM

E=

15N

corr=

14

133

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Jef

fers

onLO

UIS

VIL

LE, K

Y-I

Nid

=21

1110

051-

1(1

-hr)

Cor

rela

tion=

0.34

Npo

ss=

18 N

GO

ME=

18N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

134

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Jef

fers

onLO

UIS

VIL

LE, K

Y-I

Nid

=21

1111

021-

2(1

-hr)

Cor

rela

tion=

-0.3

2N

poss

=16

NG

OM

E=

16N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

Jef

fers

onLO

UIS

VIL

LE, K

Y-I

Nid

=21

1111

021-

2(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

18 N

GO

ME=

18N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

135

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

KY

Ken

ton

CIN

CIN

NA

TI,

OH

-KY

-IN

id=

2111

7000

7-2

(1-h

r)C

orre

latio

n=0.

20N

poss

=15

NG

OM

E=

15N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

136

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KY

McC

rack

enN

OT

IN A

N M

SA

id=

2114

5102

4-1

(1-h

r)C

orre

latio

n=0.

43N

poss

=13

NG

OM

E=

13N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

137

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

NC

For

syth

GR

EE

NS

BO

RO

--W

INS

TO

N-S

ALE

M--

HIG

H P

OIN

T, N

Cid

=37

0670

022-

1(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

16 N

GO

ME=

16N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NC

For

syth

GR

EE

NS

BO

RO

--W

INS

TO

N-S

ALE

M--

HIG

H P

OIN

T, N

Cid

=37

0670

022-

1(1

-hr)

Cor

rela

tion=

0.51

Npo

ss=

19 N

GO

ME=

19N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NC

For

syth

GR

EE

NS

BO

RO

--W

INS

TO

N-S

ALE

M--

HIG

H P

OIN

T, N

Cid

=37

0670

022-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

12 N

GO

ME=

12N

corr=

11

138

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NC

Mec

klen

burg

CH

AR

LOT

TE

-GA

ST

ON

IA-R

OC

K H

ILL,

NC

-SC

id=

3711

9003

4-1

(1-h

r)C

orre

latio

n=0.

65N

poss

=18

NG

OM

E=

18N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NC

Mec

klen

burg

CH

AR

LOT

TE

-GA

ST

ON

IA-R

OC

K H

ILL,

NC

-SC

id=

3711

9003

4-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=19

NG

OM

E=

19N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NC

Mec

klen

burg

CH

AR

LOT

TE

-GA

ST

ON

IA-R

OC

K H

ILL,

NC

-SC

id=

3711

9003

4-1

(1-h

r)C

orre

latio

n=0.

28N

poss

=18

NG

OM

E=

18N

corr=

16

139

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

SC

Gre

envi

lleG

RE

EN

VIL

LE-S

PA

RT

AN

BU

RG

-AN

DE

RS

ON

, SC

id=

4504

5000

8-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=16

NG

OM

E=

16N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

SC

Gre

envi

lleG

RE

EN

VIL

LE-S

PA

RT

AN

BU

RG

-AN

DE

RS

ON

, SC

id=

4504

5000

8-1

(1-h

r)C

orre

latio

n=-0

.39

Npo

ss=

20 N

GO

ME=

20N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

140

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Bra

dley

NO

T IN

AN

MS

Aid

=47

0110

102-

1(1

-hr)

Cor

rela

tion=

-0.4

4N

poss

=14

NG

OM

E=

14N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Bra

dley

NO

T IN

AN

MS

Aid

=47

0110

102-

1(1

-hr)

Cor

rela

tion=

-0.1

3N

poss

=22

NG

OM

E=

22N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Bra

dley

NO

T IN

AN

MS

Aid

=47

0110

102-

1(1

-hr)

Cor

rela

tion=

-0.2

6N

poss

=14

NG

OM

E=

14N

corr=

11

141

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Dav

idso

nN

AS

HV

ILLE

, TN

id=

4703

7001

1-1

(1-h

r)C

orre

latio

n=0.

27N

poss

=15

NG

OM

E=

15N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

142

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Lou

don

KN

OX

VIL

LE, T

Nid

=47

1050

003-

1(1

-hr)

Cor

rela

tion=

-0.1

3N

poss

=11

NG

OM

E=

11N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

143

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

McM

inn

NO

T IN

AN

MS

Aid

=47

1070

101-

1(1

-hr)

Cor

rela

tion=

0.01

Npo

ss=

16 N

GO

ME=

16N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

McM

inn

NO

T IN

AN

MS

Aid

=47

1070

101-

1(1

-hr)

Cor

rela

tion=

-0.2

6N

poss

=24

NG

OM

E=

24N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

McM

inn

NO

T IN

AN

MS

Aid

=47

1070

101-

1(1

-hr)

Cor

rela

tion=

-0.0

3N

poss

=14

NG

OM

E=

14N

corr=

12

144

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

She

lby

ME

MP

HIS

, TN

-AR

-MS

id=

4715

7002

4-1

(1-h

r)C

orre

latio

n=-0

.07

Npo

ss=

16 N

GO

ME=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

She

lby

ME

MP

HIS

, TN

-AR

-MS

id=

4715

7002

4-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=19

NG

OM

E=

19N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

She

lby

ME

MP

HIS

, TN

-AR

-MS

id=

4715

7002

4-1

(1-h

r)C

orre

latio

n=0.

25N

poss

=20

NG

OM

E=

20N

corr=

20

145

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Sul

livan

JOH

NS

ON

CIT

Y-K

ING

SP

OR

T-B

RIS

TO

L, T

N-V

Aid

=47

1630

007-

1(1

-hr)

Cor

rela

tion=

0.02

Npo

ss=

19 N

GO

ME=

19N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TN

Sul

livan

JOH

NS

ON

CIT

Y-K

ING

SP

OR

T-B

RIS

TO

L, T

N-V

Aid

=47

1630

007-

1(1

-hr)

Cor

rela

tion=

0.39

Npo

ss=

10 N

GO

ME=

10N

corr=

10

146

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

3-1

(1-h

r)C

orre

latio

n=0.

56N

poss

=14

NG

OM

E=

14N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

3-1

(1-h

r)C

orre

latio

n=-0

.26

Npo

ss=

19 N

GO

ME=

19N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

3-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=20

NG

OM

E=

20N

corr=

18

147

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

4-1

(1-h

r)C

orre

latio

n=0.

55N

poss

=15

NG

OM

E=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

4-1

(1-h

r)C

orre

latio

n=0.

10N

poss

=15

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1006

4-1

(1-h

r)C

orre

latio

n=0.

35N

poss

=19

NG

OM

E=

19N

corr=

18

148

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1007

2-1

(1-h

r)C

orre

latio

n=-0

.06

Npo

ss=

20 N

GO

ME=

20N

corr=

15

149

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1310

1-1

(1-h

r)C

orre

latio

n=0.

42N

poss

=15

NG

OM

E=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1310

1-1

(1-h

r)C

orre

latio

n=-0

.06

Npo

ss=

16 N

GO

ME=

16N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1310

1-1

(1-h

r)C

orre

latio

n=0.

38N

poss

=19

NG

OM

E=

19N

corr=

16

150

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1400

2-1

(1-h

r)C

orre

latio

n=0.

35N

poss

=14

NG

OM

E=

14N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1400

2-1

(1-h

r)C

orre

latio

n=0.

12N

poss

=15

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1400

2-1

(1-h

r)C

orre

latio

n=0.

42N

poss

=19

NG

OM

E=

19N

corr=

19

151

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1420

1-1

(1-h

r)C

orre

latio

n=0.

73N

poss

=22

NG

OM

E=

22N

corr=

16

152

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1800

3-1

(1-h

r)C

orre

latio

n=0.

30N

poss

=15

NG

OM

E=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1800

3-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=15

NG

OM

E=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IL C

ook

CH

ICA

GO

, IL

id=

1703

1800

3-1

(1-h

r)C

orre

latio

n=0.

75N

poss

=17

NG

OM

E=

17N

corr=

13

153

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL L

ake

CH

ICA

GO

, IL

id=

1709

7100

7-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=19

NG

OM

E=

19N

corr=

15

154

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL S

t_C

lair

ST

. LO

UIS

, MO

-IL

id=

1716

3001

0-2

(1-h

r)C

orre

latio

n=0.

08N

poss

=14

NG

OM

E=

14N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL S

t_C

lair

ST

. LO

UIS

, MO

-IL

id=

1716

3001

0-2

(1-h

r)C

orre

latio

n=0.

09N

poss

=16

NG

OM

E=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IL S

t_C

lair

ST

. LO

UIS

, MO

-IL

id=

1716

3001

0-2

(1-h

r)C

orre

latio

n=-0

.16

Npo

ss=

13 N

GO

ME=

13N

corr=

12

155

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IN L

ake

GA

RY

, IN

id=

1808

9002

2-1

(1-h

r)C

orre

latio

n=-0

.03

Npo

ss=

14 N

GO

ME=

14N

corr=

12

156

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

IN L

ake

GA

RY

, IN

id=

1808

9101

6-2

(1-h

r)C

orre

latio

n=0.

51N

poss

=12

NG

OM

E=

12N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IN L

ake

GA

RY

, IN

id=

1808

9101

6-2

(1-h

r)C

orre

latio

n=-0

.20

Npo

ss=

15 N

GO

ME=

15N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

157

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015GOME NO2 (1X10

15 mol/cm

2)

IN S

t_Jo

seph

SO

UT

H B

EN

D, I

Nid

=18

1410

012-

1(1

-hr)

Cor

rela

tion=

0.45

Npo

ss=

16 N

GO

ME=

16N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

158

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

IN S

t_Jo

seph

SO

UT

H B

EN

D, I

Nid

=18

1411

008-

1(1

-hr)

Cor

rela

tion=

0.38

Npo

ss=

21 N

GO

ME=

21N

corr=

19

159

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

200

250

300

Surface NO2 (ppbv)

010203040

GOME NO2 (1X1015

mol/cm2)

MI M

acom

bD

ET

RO

IT, M

Iid

=26

0990

009-

1(1

-hr)

Cor

rela

tion=

0.06

Npo

ss=

18 N

GO

ME=

18N

corr=

11

160

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MI W

ayne

DE

TR

OIT

, MI

id=

2616

3001

6-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=12

NG

OM

E=

12N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

161

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

200

Surface NO2 (ppbv)

05101520253035

GOME NO2 (1X1015

mol/cm2)

MI W

ayne

DE

TR

OIT

, MI

id=

2616

3001

9-2

(1-h

r)C

orre

latio

n=0.

53N

poss

=16

NG

OM

E=

16N

corr=

12

162

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Dak

ota

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

0370

020-

1(1

-hr)

Cor

rela

tion=

0.56

Npo

ss=

14 N

GO

ME=

14N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Dak

ota

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

0370

020-

1(1

-hr)

Cor

rela

tion=

0.35

Npo

ss=

12 N

GO

ME=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Dak

ota

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

0370

020-

1(1

-hr)

Cor

rela

tion=

0.01

Npo

ss=

17 N

GO

ME=

17N

corr=

11

163

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Dak

ota

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

0370

423-

1(1

-hr)

Cor

rela

tion=

0.12

Npo

ss=

17 N

GO

ME=

17N

corr=

10

164

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Ram

sey

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

1230

864-

1(1

-hr)

Cor

rela

tion=

0.54

Npo

ss=

15 N

GO

ME=

15N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Ram

sey

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

1230

864-

1(1

-hr)

Cor

rela

tion=

0.38

Npo

ss=

11 N

GO

ME=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MN

Ram

sey

MIN

NE

AP

OLI

S-S

T. P

AU

L, M

N-W

Iid

=27

1230

864-

1(1

-hr)

Cor

rela

tion=

0.23

Npo

ss=

17 N

GO

ME=

17N

corr=

15

165

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OH

Cuy

ahog

aC

LEV

ELA

ND

-LO

RA

IN-E

LYR

IA, O

Hid

=39

0350

060-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

12 N

GO

ME=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

200

250

Surface NO2 (ppbv)

0102030

GOME NO2 (1X1015

mol/cm2)

OH

Cuy

ahog

aC

LEV

ELA

ND

-LO

RA

IN-E

LYR

IA, O

Hid

=39

0350

060-

1(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

14 N

GO

ME=

14N

corr=

13

166

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OH

Cuy

ahog

aC

LEV

ELA

ND

-LO

RA

IN-E

LYR

IA, O

Hid

=39

0350

066-

1(1

-hr)

Cor

rela

tion=

0.61

Npo

ss=

13 N

GO

ME=

13N

corr=

11

167

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

OH

Ham

ilton

CIN

CIN

NA

TI,

OH

-KY

-IN

id=

3906

1003

7-1

(1-h

r)C

orre

latio

n=0.

70N

poss

=12

NG

OM

E=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

OH

Ham

ilton

CIN

CIN

NA

TI,

OH

-KY

-IN

id=

3906

1003

7-1

(1-h

r)C

orre

latio

n=0.

06N

poss

=16

NG

OM

E=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

168

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

OH

Ham

ilton

CIN

CIN

NA

TI,

OH

-KY

-IN

id=

3906

1400

2-1

(1-h

r)C

orre

latio

n=0.

15N

poss

=13

NG

OM

E=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

OH

Ham

ilton

CIN

CIN

NA

TI,

OH

-KY

-IN

id=

3906

1400

2-1

(1-h

r)C

orre

latio

n=-0

.32

Npo

ss=

16 N

GO

ME=

16N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

169

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OH

Jef

fers

onS

TE

UB

EN

VIL

LE-W

EIR

TO

N, O

H-W

Vid

=39

0811

012-

2(1

-hr)

Cor

rela

tion=

0.25

Npo

ss=

15 N

GO

ME=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OH

Jef

fers

onS

TE

UB

EN

VIL

LE-W

EIR

TO

N, O

H-W

Vid

=39

0811

012-

2(1

-hr)

Cor

rela

tion=

0.26

Npo

ss=

13 N

GO

ME=

13N

corr=

13

170

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9000

7-1

(1-h

r)C

orre

latio

n=0.

41N

poss

=13

NG

OM

E=

13N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9000

7-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9000

7-1

(1-h

r)C

orre

latio

n=0.

59N

poss

=21

NG

OM

E=

21N

corr=

20

171

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9004

1-1

(1-h

r)C

orre

latio

n=0.

69N

poss

=13

NG

OM

E=

13N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9004

1-1

(1-h

r)C

orre

latio

n=0.

28N

poss

=12

NG

OM

E=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WI M

ilwau

kee

MIL

WA

UK

EE

-WA

UK

ES

HA

, WI

id=

5507

9004

1-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=20

NG

OM

E=

20N

corr=

17

172

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AR

Pul

aski

LIT

TLE

RO

CK

-NO

RT

H L

ITT

LE R

OC

K, A

Rid

=05

1191

002-

1(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

16 N

GO

ME=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AR

Pul

aski

LIT

TLE

RO

CK

-NO

RT

H L

ITT

LE R

OC

K, A

Rid

=05

1191

002-

1(1

-hr)

Cor

rela

tion=

0.41

Npo

ss=

14 N

GO

ME=

14N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AR

Pul

aski

LIT

TLE

RO

CK

-NO

RT

H L

ITT

LE R

OC

K, A

Rid

=05

1191

002-

1(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

18 N

GO

ME=

18N

corr=

14

173

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3000

3-1

(1-h

r)C

orre

latio

n=0.

48N

poss

=20

NG

OM

E=

20N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3000

3-1

(1-h

r)C

orre

latio

n=-0

.19

Npo

ss=

12 N

GO

ME=

12N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3000

3-1

(1-h

r)C

orre

latio

n=0.

17N

poss

=19

NG

OM

E=

19N

corr=

12

174

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3000

9-1

(1-h

r)C

orre

latio

n=0.

51N

poss

=20

NG

OM

E=

20N

corr=

18

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3000

9-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=19

NG

OM

E=

19N

corr=

18

175

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA E

ast_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2203

3100

1-1

(1-h

r)C

orre

latio

n=0.

61N

poss

=21

NG

OM

E=

21N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

176

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA Ib

ervi

lleN

OT

IN A

N M

SA

id=

2204

7000

2-1

(1-h

r)C

orre

latio

n=0.

29N

poss

=21

NG

OM

E=

21N

corr=

20

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA Ib

ervi

lleN

OT

IN A

N M

SA

id=

2204

7000

2-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=14

NG

OM

E=

13N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA Ib

ervi

lleN

OT

IN A

N M

SA

id=

2204

7000

2-1

(1-h

r)C

orre

latio

n=0.

27N

poss

=17

NG

OM

E=

17N

corr=

12

177

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA Ib

ervi

lleN

OT

IN A

N M

SA

id=

2204

7000

9-1

(1-h

r)C

orre

latio

n=0.

06N

poss

=20

NG

OM

E=

20N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

178

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA J

effe

rson

NE

W O

RLE

AN

S, L

Aid

=22

0511

001-

1(1

-hr)

Cor

rela

tion=

0.59

Npo

ss=

19 N

GO

ME=

19N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

179

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA O

rlean

sN

EW

OR

LEA

NS

, LA

id=

2207

1001

2-1

(1-h

r)C

orre

latio

n=0.

53N

poss

=19

NG

OM

E=

19N

corr=

18

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA O

rlean

sN

EW

OR

LEA

NS

, LA

id=

2207

1001

2-1

(1-h

r)C

orre

latio

n=0.

12N

poss

=16

NG

OM

E=

16N

corr=

14

180

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA S

t_Ja

mes

NE

W O

RLE

AN

S, L

Aid

=22

0930

002-

1(1

-hr)

Cor

rela

tion=

0.47

Npo

ss=

15 N

GO

ME=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA S

t_Ja

mes

NE

W O

RLE

AN

S, L

Aid

=22

0930

002-

1(1

-hr)

Cor

rela

tion=

0.33

Npo

ss=

15 N

GO

ME=

15N

corr=

10

181

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA W

est_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2212

1000

1-1

(1-h

r)C

orre

latio

n=0.

79N

poss

=21

NG

OM

E=

21N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

LA W

est_

Bat

on_R

oug

BA

TO

N R

OU

GE

, LA

id=

2212

1000

1-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=18

NG

OM

E=

18N

corr=

10

182

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Ber

nalil

loA

LBU

QU

ER

QU

E, N

Mid

=35

0010

023-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

26 N

GO

ME=

26N

corr=

25

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Ber

nalil

loA

LBU

QU

ER

QU

E, N

Mid

=35

0010

023-

1(1

-hr)

Cor

rela

tion=

0.47

Npo

ss=

27 N

GO

ME=

27N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Ber

nalil

loA

LBU

QU

ER

QU

E, N

Mid

=35

0010

023-

1(1

-hr)

Cor

rela

tion=

-0.0

3N

poss

=30

NG

OM

E=

30N

corr=

28

183

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Don

a_A

naLA

S C

RU

CE

S, N

Mid

=35

0130

021-

1(1

-hr)

Cor

rela

tion=

0.13

Npo

ss=

26 N

GO

ME=

26N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Don

a_A

naLA

S C

RU

CE

S, N

Mid

=35

0130

021-

1(1

-hr)

Cor

rela

tion=

-0.1

0N

poss

=15

NG

OM

E=

15N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

Don

a_A

naLA

S C

RU

CE

S, N

Mid

=35

0130

021-

1(1

-hr)

Cor

rela

tion=

-0.0

5N

poss

=24

NG

OM

E=

24N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

184

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

San

dova

lA

LBU

QU

ER

QU

E, N

Mid

=35

0431

003-

1(1

-hr)

Cor

rela

tion=

0.29

Npo

ss=

25 N

GO

ME=

25N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

San

dova

lA

LBU

QU

ER

QU

E, N

Mid

=35

0431

003-

1(1

-hr)

Cor

rela

tion=

-0.4

0N

poss

=27

NG

OM

E=

27N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

185

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

San

_Jua

nN

OT

IN A

N M

SA

id=

3504

5000

9-1

(1-h

r)C

orre

latio

n=0.

12N

poss

=23

NG

OM

E=

23N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

NM

San

_Jua

nN

OT

IN A

N M

SA

id=

3504

5000

9-1

(1-h

r)C

orre

latio

n=-0

.43

Npo

ss=

27 N

GO

ME=

27N

corr=

14

186

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Cle

vela

ndO

KLA

HO

MA

CIT

Y, O

Kid

=40

0270

049-

1(1

-hr)

Cor

rela

tion=

0.45

Npo

ss=

16 N

GO

ME=

15N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Cle

vela

ndO

KLA

HO

MA

CIT

Y, O

Kid

=40

0270

049-

1(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

20 N

GO

ME=

20N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

187

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Gar

field

EN

ID, O

Kid

=40

0470

552-

1(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

17 N

GO

ME=

17N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

188

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Okl

ahom

aO

KLA

HO

MA

CIT

Y, O

Kid

=40

1090

033-

1(1

-hr)

Cor

rela

tion=

0.06

Npo

ss=

16 N

GO

ME=

16N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Okl

ahom

aO

KLA

HO

MA

CIT

Y, O

Kid

=40

1090

033-

1(1

-hr)

Cor

rela

tion=

0.53

Npo

ss=

21 N

GO

ME=

21N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Okl

ahom

aO

KLA

HO

MA

CIT

Y, O

Kid

=40

1090

033-

1(1

-hr)

Cor

rela

tion=

0.40

Npo

ss=

19 N

GO

ME=

19N

corr=

13

189

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

174-

1(1

-hr)

Cor

rela

tion=

0.50

Npo

ss=

19 N

GO

ME=

19N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

174-

1(1

-hr)

Cor

rela

tion=

0.58

Npo

ss=

12 N

GO

ME=

12N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

190

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

191-

1(1

-hr)

Cor

rela

tion=

0.43

Npo

ss=

19 N

GO

ME=

19N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

191-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

12 N

GO

ME=

12N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

191-

1(1

-hr)

Cor

rela

tion=

0.57

Npo

ss=

17 N

GO

ME=

17N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OK

Tul

saT

ULS

A, O

Kid

=40

1430

191-

1(1

-hr)

Cor

rela

tion=

0.54

Npo

ss=

21 N

GO

ME=

21N

corr=

13

191

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Bex

arS

AN

AN

TO

NIO

, TX

id=

4802

9004

6-1

(1-h

r)C

orre

latio

n=0.

70N

poss

=20

NG

OM

E=

20N

corr=

10

192

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

045-

1(1

-hr)

Cor

rela

tion=

0.59

Npo

ss=

17 N

GO

ME=

17N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

045-

1(1

-hr)

Cor

rela

tion=

0.62

Npo

ss=

10 N

GO

ME=

10N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

045-

1(1

-hr)

Cor

rela

tion=

0.66

Npo

ss=

14 N

GO

ME=

14N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

045-

1(1

-hr)

Cor

rela

tion=

0.17

Npo

ss=

23 N

GO

ME=

23N

corr=

19

193

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

069-

2(1

-hr)

Cor

rela

tion=

0.40

Npo

ss=

16 N

GO

ME=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

069-

2(1

-hr)

Cor

rela

tion=

0.46

Npo

ss=

13 N

GO

ME=

13N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

069-

2(1

-hr)

Cor

rela

tion=

0.32

Npo

ss=

23 N

GO

ME=

23N

corr=

13

194

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Dal

las

DA

LLA

S, T

Xid

=48

1130

087-

1(1

-hr)

Cor

rela

tion=

0.51

Npo

ss=

17 N

GO

ME=

17N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

195

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

200

Surface NO2 (ppbv)

051015202530

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

027-

1(1

-hr)

Cor

rela

tion=

0.19

Npo

ss=

26 N

GO

ME=

26N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

027-

1(1

-hr)

Cor

rela

tion=

-0.3

1N

poss

=14

NG

OM

E=

14N

corr=

11

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

027-

1(1

-hr)

Cor

rela

tion=

0.16

Npo

ss=

24 N

GO

ME=

24N

corr=

23

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

027-

1(1

-hr)

Cor

rela

tion=

-0.0

9N

poss

=24

NG

OM

E=

24N

corr=

23

196

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

200

Surface NO2 (ppbv)

051015202530

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

028-

1(1

-hr)

Cor

rela

tion=

0.00

Npo

ss=

25 N

GO

ME=

25N

corr=

20

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

028-

1(1

-hr)

Cor

rela

tion=

-0.1

2N

poss

=16

NG

OM

E=

16N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

028-

1(1

-hr)

Cor

rela

tion=

0.33

Npo

ss=

26 N

GO

ME=

26N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

028-

1(1

-hr)

Cor

rela

tion=

0.41

Npo

ss=

24 N

GO

ME=

24N

corr=

23

197

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

037-

1(1

-hr)

Cor

rela

tion=

0.22

Npo

ss=

26 N

GO

ME=

26N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

037-

1(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

14 N

GO

ME=

14N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

037-

1(1

-hr)

Cor

rela

tion=

0.58

Npo

ss=

24 N

GO

ME=

24N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

El_

Pas

oE

L P

AS

O, T

Xid

=48

1410

037-

1(1

-hr)

Cor

rela

tion=

-0.0

9N

poss

=24

NG

OM

E=

24N

corr=

18

198

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1004

7-1

(1-h

r)C

orre

latio

n=-0

.05

Npo

ss=

11 N

GO

ME=

11N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1004

7-1

(1-h

r)C

orre

latio

n=0.

05N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1004

7-1

(1-h

r)C

orre

latio

n=0.

21N

poss

=17

NG

OM

E=

17N

corr=

14

199

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1103

4-1

(1-h

r)C

orre

latio

n=0.

53N

poss

=15

NG

OM

E=

15N

corr=

13

200

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1103

5-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1103

5-1

(1-h

r)C

orre

latio

n=-0

.20

Npo

ss=

16 N

GO

ME=

16N

corr=

11

201

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Har

risH

OU

ST

ON

, TX

id=

4820

1103

7-1

(1-h

r)C

orre

latio

n=0.

76N

poss

=16

NG

OM

E=

16N

corr=

14

202

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Tar

rant

FO

RT

WO

RT

H-A

RLI

NG

TO

N, T

Xid

=48

4391

002-

1(1

-hr)

Cor

rela

tion=

0.23

Npo

ss=

21 N

GO

ME=

21N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Tar

rant

FO

RT

WO

RT

H-A

RLI

NG

TO

N, T

Xid

=48

4391

002-

1(1

-hr)

Cor

rela

tion=

0.52

Npo

ss=

15 N

GO

ME=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

TX

Tar

rant

FO

RT

WO

RT

H-A

RLI

NG

TO

N, T

Xid

=48

4391

002-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

24 N

GO

ME=

24N

corr=

17

203

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

KS

Wya

ndot

teK

AN

SA

S C

ITY

, MO

-KS

id=

2020

9002

0-1

(1-h

r)C

orre

latio

n=0.

36N

poss

=17

NG

OM

E=

17N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

KS

Wya

ndot

teK

AN

SA

S C

ITY

, MO

-KS

id=

2020

9002

0-1

(1-h

r)C

orre

latio

n=0.

58N

poss

=19

NG

OM

E=

19N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

KS

Wya

ndot

teK

AN

SA

S C

ITY

, MO

-KS

id=

2020

9002

0-1

(1-h

r)C

orre

latio

n=0.

30N

poss

=16

NG

OM

E=

16N

corr=

16

204

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

Pla

tteK

AN

SA

S C

ITY

, MO

-KS

id=

2916

5002

3-1

(1-h

r)C

orre

latio

n=0.

40N

poss

=20

NG

OM

E=

20N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

205

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Cha

rles

ST

. LO

UIS

, MO

-IL

id=

2918

3100

2-1

(1-h

r)C

orre

latio

n=0.

22N

poss

=16

NG

OM

E=

16N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MO

St_

Cha

rles

ST

. LO

UIS

, MO

-IL

id=

2918

3100

2-1

(1-h

r)C

orre

latio

n=0.

48N

poss

=16

NG

OM

E=

16N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

206

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1890

001-

2(1

-hr)

Cor

rela

tion=

0.39

Npo

ss=

13 N

GO

ME=

13N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1890

001-

2(1

-hr)

Cor

rela

tion=

0.36

Npo

ss=

16 N

GO

ME=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1890

001-

2(1

-hr)

Cor

rela

tion=

0.14

Npo

ss=

15 N

GO

ME=

15N

corr=

12

207

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1893

001-

2(1

-hr)

Cor

rela

tion=

0.53

Npo

ss=

14 N

GO

ME=

14N

corr=

14

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1893

001-

2(1

-hr)

Cor

rela

tion=

0.33

Npo

ss=

16 N

GO

ME=

16N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1893

001-

2(1

-hr)

Cor

rela

tion=

0.24

Npo

ss=

13 N

GO

ME=

13N

corr=

13

208

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1895

001-

1(1

-hr)

Cor

rela

tion=

0.32

Npo

ss=

15 N

GO

ME=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1895

001-

1(1

-hr)

Cor

rela

tion=

0.41

Npo

ss=

17 N

GO

ME=

17N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1895

001-

1(1

-hr)

Cor

rela

tion=

0.42

Npo

ss=

14 N

GO

ME=

14N

corr=

13

209

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1897

002-

2(1

-hr)

Cor

rela

tion=

0.45

Npo

ss=

16 N

GO

ME=

16N

corr=

16

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1897

002-

2(1

-hr)

Cor

rela

tion=

0.28

Npo

ss=

18 N

GO

ME=

18N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

sS

T. L

OU

IS, M

O-I

Lid

=29

1897

002-

2(1

-hr)

Cor

rela

tion=

0.55

Npo

ss=

13 N

GO

ME=

13N

corr=

12

210

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

072-

2(1

-hr)

Cor

rela

tion=

0.09

Npo

ss=

14 N

GO

ME=

14N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

072-

2(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

16 N

GO

ME=

16N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

072-

2(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

12 N

GO

ME=

12N

corr=

12

211

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

080-

1(1

-hr)

Cor

rela

tion=

0.31

Npo

ss=

15 N

GO

ME=

15N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

200

250

Surface NO2 (ppbv)

010203040

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

080-

1(1

-hr)

Cor

rela

tion=

0.01

Npo

ss=

17 N

GO

ME=

17N

corr=

12

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

MO

St_

Loui

s_C

ityS

T. L

OU

IS, M

O-I

Lid

=29

5100

080-

1(1

-hr)

Cor

rela

tion=

0.25

Npo

ss=

15 N

GO

ME=

15N

corr=

13

212

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CO

Ada

ms

DE

NV

ER

, CO

id=

0800

1300

1-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=18

NG

OM

E=

18N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CO

Ada

ms

DE

NV

ER

, CO

id=

0800

1300

1-1

(1-h

r)C

orre

latio

n=0.

28N

poss

=26

NG

OM

E=

26N

corr=

15

213

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CO

Den

ver

DE

NV

ER

, CO

id=

0803

1000

2-1

(1-h

r)C

orre

latio

n=0.

45N

poss

=17

NG

OM

E=

17N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Den

ver

DE

NV

ER

, CO

id=

0803

1000

2-1

(1-h

r)C

orre

latio

n=0.

57N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Den

ver

DE

NV

ER

, CO

id=

0803

1000

2-1

(1-h

r)C

orre

latio

n=0.

46N

poss

=21

NG

OM

E=

21N

corr=

20

214

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1600

4-1

(1-h

r)C

orre

latio

n=0.

68N

poss

=18

NG

OM

E=

18N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1600

4-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=13

NG

OM

E=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1600

4-1

(1-h

r)C

orre

latio

n=-0

.31

Npo

ss=

16 N

GO

ME=

16N

corr=

14

215

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1601

1-1

(1-h

r)C

orre

latio

n=0.

06N

poss

=16

NG

OM

E=

16N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1601

1-1

(1-h

r)C

orre

latio

n=-0

.20

Npo

ss=

17 N

GO

ME=

17N

corr=

13

216

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CO

El_

Pas

oC

OLO

RA

DO

SP

RIN

GS

, CO

id=

0804

1601

8-1

(1-h

r)C

orre

latio

n=-0

.07

Npo

ss=

16 N

GO

ME=

16N

corr=

14

217

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

006-

1(1

-hr)

Cor

rela

tion=

0.16

Npo

ss=

17 N

GO

ME=

17N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

006-

1(1

-hr)

Cor

rela

tion=

0.08

Npo

ss=

23 N

GO

ME=

23N

corr=

12

218

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

008-

1(1

-hr)

Cor

rela

tion=

0.48

Npo

ss=

17 N

GO

ME=

17N

corr=

11

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

008-

1(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

24 N

GO

ME=

24N

corr=

22

219

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

009-

1(1

-hr)

Cor

rela

tion=

0.36

Npo

ss=

18 N

GO

ME=

18N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CO

Jef

fers

onD

EN

VE

R, C

Oid

=08

0590

009-

1(1

-hr)

Cor

rela

tion=

-0.0

6N

poss

=24

NG

OM

E=

24N

corr=

17

220

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

ND

Mer

cer

NO

T IN

AN

MS

Aid

=38

0570

124-

1(1

-hr)

Cor

rela

tion=

0.06

Npo

ss=

29 N

GO

ME=

29N

corr=

10

221

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Dav

isS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4901

1000

1-1

(1-h

r)C

orre

latio

n=0.

54N

poss

=13

NG

OM

E=

13N

corr=

10

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Dav

isS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4901

1000

1-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=22

NG

OM

E=

22N

corr=

18

222

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Sal

t_La

keS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4903

5000

3-1

(1-h

r)C

orre

latio

n=0.

31N

poss

=16

NG

OM

E=

16N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Sal

t_La

keS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4903

5000

3-1

(1-h

r)C

orre

latio

n=0.

45N

poss

=22

NG

OM

E=

22N

corr=

14

223

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Sal

t_La

keS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4903

5300

6-1

(1-h

r)C

orre

latio

n=0.

35N

poss

=22

NG

OM

E=

22N

corr=

21

224

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Uta

hP

RO

VO

-OR

EM

, UT

id=

4904

9000

2-1

(1-h

r)C

orre

latio

n=0.

16N

poss

=17

NG

OM

E=

17N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Uta

hP

RO

VO

-OR

EM

, UT

id=

4904

9000

2-1

(1-h

r)C

orre

latio

n=-0

.16

Npo

ss=

22 N

GO

ME=

22N

corr=

17

225

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Web

erS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4905

7000

1-2

(1-h

r)C

orre

latio

n=0.

47N

poss

=18

NG

OM

E=

18N

corr=

18

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

UT

Web

erS

ALT

LA

KE

CIT

Y-O

GD

EN

, UT

id=

4905

7000

1-2

(1-h

r)C

orre

latio

n=0.

19N

poss

=22

NG

OM

E=

22N

corr=

17

226

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0130

019-

1(1

-hr)

Cor

rela

tion=

0.71

Npo

ss=

23 N

GO

ME=

23N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0130

019-

1(1

-hr)

Cor

rela

tion=

0.46

Npo

ss=

17 N

GO

ME=

17N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0130

019-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

28 N

GO

ME=

28N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0130

019-

1(1

-hr)

Cor

rela

tion=

0.47

Npo

ss=

25 N

GO

ME=

25N

corr=

20

227

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

002-

6(1

-hr)

Cor

rela

tion=

0.85

Npo

ss=

24 N

GO

ME=

24N

corr=

23

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

002-

6(1

-hr)

Cor

rela

tion=

-0.0

8N

poss

=18

NG

OM

E=

18N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

002-

6(1

-hr)

Cor

rela

tion=

0.63

Npo

ss=

29 N

GO

ME=

29N

corr=

26

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

002-

6(1

-hr)

Cor

rela

tion=

0.51

Npo

ss=

28 N

GO

ME=

28N

corr=

17

228

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

003-

1(1

-hr)

Cor

rela

tion=

0.10

Npo

ss=

22 N

GO

ME=

22N

corr=

17

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

229

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

010-

1(1

-hr)

Cor

rela

tion=

0.25

Npo

ss=

27 N

GO

ME=

27N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Mar

icop

aP

HO

EN

IX-M

ES

A, A

Zid

=04

0133

010-

1(1

-hr)

Cor

rela

tion=

0.60

Npo

ss=

25 N

GO

ME=

25N

corr=

21

230

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Pim

aT

US

CO

N, A

Zid

=04

0191

011-

1(1

-hr)

Cor

rela

tion=

0.65

Npo

ss=

24 N

GO

ME=

24N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Pim

aT

US

CO

N, A

Zid

=04

0191

011-

1(1

-hr)

Cor

rela

tion=

0.43

Npo

ss=

19 N

GO

ME=

19N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Pim

aT

US

CO

N, A

Zid

=04

0191

011-

1(1

-hr)

Cor

rela

tion=

0.52

Npo

ss=

30 N

GO

ME=

30N

corr=

21

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

AZ

Pim

aT

US

CO

N, A

Zid

=04

0191

011-

1(1

-hr)

Cor

rela

tion=

0.52

Npo

ss=

28 N

GO

ME=

28N

corr=

20

231

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0010

003-

1(1

-hr)

Cor

rela

tion=

0.47

Npo

ss=

27 N

GO

ME=

27N

corr=

23

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0010

003-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

26 N

GO

ME=

26N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0010

003-

1(1

-hr)

Cor

rela

tion=

0.45

Npo

ss=

32 N

GO

ME=

32N

corr=

31

232

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0011

001-

1(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

24 N

GO

ME=

24N

corr=

20

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0011

001-

1(1

-hr)

Cor

rela

tion=

0.57

Npo

ss=

26 N

GO

ME=

26N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ala

med

aO

AK

LAN

D, C

Aid

=06

0011

001-

1(1

-hr)

Cor

rela

tion=

0.58

Npo

ss=

26 N

GO

ME=

26N

corr=

24

233

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

But

teC

HIC

O-P

AR

AD

ISE

, CA

id=

0600

7000

2-1

(1-h

r)C

orre

latio

n=-0

.23

Npo

ss=

24 N

GO

ME=

23N

corr=

22

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

But

teC

HIC

O-P

AR

AD

ISE

, CA

id=

0600

7000

2-1

(1-h

r)C

orre

latio

n=0.

01N

poss

=23

NG

OM

E=

21N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

But

teC

HIC

O-P

AR

AD

ISE

, CA

id=

0600

7000

2-1

(1-h

r)C

orre

latio

n=0.

06N

poss

=30

NG

OM

E=

30N

corr=

27

234

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

002-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

28 N

GO

ME=

28N

corr=

21

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

002-

1(1

-hr)

Cor

rela

tion=

0.02

Npo

ss=

12 N

GO

ME=

12N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

002-

1(1

-hr)

Cor

rela

tion=

0.40

Npo

ss=

23 N

GO

ME=

23N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

002-

1(1

-hr)

Cor

rela

tion=

0.56

Npo

ss=

26 N

GO

ME=

26N

corr=

24

235

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

003-

1(1

-hr)

Cor

rela

tion=

0.37

Npo

ss=

26 N

GO

ME=

26N

corr=

24

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0130

003-

1(1

-hr)

Cor

rela

tion=

0.39

Npo

ss=

24 N

GO

ME=

23N

corr=

12

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

236

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0131

002-

1(1

-hr)

Cor

rela

tion=

0.39

Npo

ss=

27 N

GO

ME=

27N

corr=

22

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0131

002-

1(1

-hr)

Cor

rela

tion=

0.59

Npo

ss=

17 N

GO

ME=

16N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0131

002-

1(1

-hr)

Cor

rela

tion=

0.47

Npo

ss=

34 N

GO

ME=

34N

corr=

31

237

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0131

003-

1(1

-hr)

Cor

rela

tion=

0.15

Npo

ss=

26 N

GO

ME=

26N

corr=

13

238

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0133

001-

1(1

-hr)

Cor

rela

tion=

0.36

Npo

ss=

25 N

GO

ME=

25N

corr=

22

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0133

001-

1(1

-hr)

Cor

rela

tion=

0.31

Npo

ss=

21 N

GO

ME=

20N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Con

tra_

Cos

taO

AK

LAN

D, C

Aid

=06

0133

001-

1(1

-hr)

Cor

rela

tion=

0.62

Npo

ss=

27 N

GO

ME=

27N

corr=

24

239

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

El_

Dor

ado

SA

CR

AM

EN

TO

, CA

id=

0601

7001

1-1

(1-h

r)C

orre

latio

n=-0

.05

Npo

ss=

30 N

GO

ME=

26N

corr=

24

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

El_

Dor

ado

SA

CR

AM

EN

TO

, CA

id=

0601

7001

1-1

(1-h

r)C

orre

latio

n=-0

.25

Npo

ss=

29 N

GO

ME=

27N

corr=

21

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

El_

Dor

ado

SA

CR

AM

EN

TO

, CA

id=

0601

7001

1-1

(1-h

r)C

orre

latio

n=-0

.09

Npo

ss=

32 N

GO

ME=

31N

corr=

25

240

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

7-1

(1-h

r)C

orre

latio

n=0.

12N

poss

=25

NG

OM

E=

25N

corr=

23

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

7-1

(1-h

r)C

orre

latio

n=0.

61N

poss

=19

NG

OM

E=

19N

corr=

19

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

7-1

(1-h

r)C

orre

latio

n=0.

55N

poss

=30

NG

OM

E=

30N

corr=

26

241

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

8-1

(1-h

r)C

orre

latio

n=0.

37N

poss

=28

NG

OM

E=

28N

corr=

26

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

8-1

(1-h

r)C

orre

latio

n=0.

26N

poss

=18

NG

OM

E=

18N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9000

8-1

(1-h

r)C

orre

latio

n=0.

44N

poss

=32

NG

OM

E=

32N

corr=

30

242

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9024

2-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=27

NG

OM

E=

27N

corr=

27

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9024

2-1

(1-h

r)C

orre

latio

n=0.

24N

poss

=16

NG

OM

E=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9024

2-1

(1-h

r)C

orre

latio

n=0.

34N

poss

=31

NG

OM

E=

31N

corr=

28

243

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9400

1-1

(1-h

r)C

orre

latio

n=0.

11N

poss

=25

NG

OM

E=

25N

corr=

25

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9400

1-1

(1-h

r)C

orre

latio

n=0.

15N

poss

=20

NG

OM

E=

20N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9400

1-1

(1-h

r)C

orre

latio

n=0.

05N

poss

=27

NG

OM

E=

27N

corr=

21

244

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9500

1-1

(1-h

r)C

orre

latio

n=0.

39N

poss

=27

NG

OM

E=

27N

corr=

25

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9500

1-1

(1-h

r)C

orre

latio

n=0.

78N

poss

=16

NG

OM

E=

16N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Fre

sno

FR

ES

NO

, CA

id=

0601

9500

1-1

(1-h

r)C

orre

latio

n=0.

16N

poss

=32

NG

OM

E=

32N

corr=

22

245

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

120

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

005-

1(1

-hr)

Cor

rela

tion=

0.14

Npo

ss=

30 N

GO

ME=

30N

corr=

18

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

Surface NO2 (ppbv)

05101520

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

005-

1(1

-hr)

Cor

rela

tion=

0.20

Npo

ss=

19 N

GO

ME=

19N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

005-

1(1

-hr)

Cor

rela

tion=

-0.0

7N

poss

=29

NG

OM

E=

29N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

005-

1(1

-hr)

Cor

rela

tion=

0.06

Npo

ss=

28 N

GO

ME=

28N

corr=

16

246

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

006-

1(1

-hr)

Cor

rela

tion=

0.51

Npo

ss=

19 N

GO

ME=

19N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Impe

rial

NO

T IN

AN

MS

Aid

=06

0250

006-

1(1

-hr)

Cor

rela

tion=

0.34

Npo

ss=

30 N

GO

ME=

30N

corr=

13

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

247

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9000

7-1

(1-h

r)C

orre

latio

n=0.

34N

poss

=26

NG

OM

E=

26N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9000

7-1

(1-h

r)C

orre

latio

n=0.

57N

poss

=15

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9000

7-1

(1-h

r)C

orre

latio

n=0.

19N

poss

=33

NG

OM

E=

33N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9000

7-1

(1-h

r)C

orre

latio

n=-0

.11

Npo

ss=

32 N

GO

ME=

32N

corr=

26

248

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

0-1

(1-h

r)C

orre

latio

n=-0

.07

Npo

ss=

23 N

GO

ME=

23N

corr=

23

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

0-1

(1-h

r)C

orre

latio

n=0.

64N

poss

=15

NG

OM

E=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

0-1

(1-h

r)C

orre

latio

n=0.

07N

poss

=33

NG

OM

E=

33N

corr=

32

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

0-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=32

NG

OM

E=

32N

corr=

30

249

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

1-1

(1-h

r)C

orre

latio

n=0.

03N

poss

=34

NG

OM

E=

34N

corr=

13

250

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

4-1

(1-h

r)C

orre

latio

n=-0

.14

Npo

ss=

25 N

GO

ME=

25N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

4-1

(1-h

r)C

orre

latio

n=0.

56N

poss

=15

NG

OM

E=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

4-1

(1-h

r)C

orre

latio

n=0.

18N

poss

=31

NG

OM

E=

31N

corr=

31

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9001

4-1

(1-h

r)C

orre

latio

n=0.

21N

poss

=33

NG

OM

E=

33N

corr=

28

251

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9023

2-1

(1-h

r)C

orre

latio

n=-0

.30

Npo

ss=

22 N

GO

ME=

22N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9023

2-1

(1-h

r)C

orre

latio

n=0.

60N

poss

=15

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9023

2-1

(1-h

r)C

orre

latio

n=0.

08N

poss

=31

NG

OM

E=

31N

corr=

27

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9023

2-1

(1-h

r)C

orre

latio

n=0.

13N

poss

=32

NG

OM

E=

32N

corr=

31

252

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9500

1-1

(1-h

r)C

orre

latio

n=0.

16N

poss

=30

NG

OM

E=

30N

corr=

30

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9500

1-1

(1-h

r)C

orre

latio

n=0.

52N

poss

=16

NG

OM

E=

15N

corr=

15

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9500

1-1

(1-h

r)C

orre

latio

n=-0

.10

Npo

ss=

35 N

GO

ME=

35N

corr=

17

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9500

1-1

(1-h

r)C

orre

latio

n=0.

34N

poss

=33

NG

OM

E=

33N

corr=

24

253

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

051015

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9600

1-1

(1-h

r)C

orre

latio

n=-0

.37

Npo

ss=

24 N

GO

ME=

24N

corr=

22

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9600

1-1

(1-h

r)C

orre

latio

n=0.

05N

poss

=16

NG

OM

E=

16N

corr=

16

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9600

1-1

(1-h

r)C

orre

latio

n=0.

25N

poss

=30

NG

OM

E=

30N

corr=

27

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Ker

nB

AK

ER

SF

IELD

, CA

id=

0602

9600

1-1

(1-h

r)C

orre

latio

n=-0

.02

Npo

ss=

30 N

GO

ME=

30N

corr=

22

254

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Kin

gsN

OT

IN A

N M

SA

id=

0603

1100

4-1

(1-h

r)C

orre

latio

n=-0

.16

Npo

ss=

25 N

GO

ME=

25N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Kin

gsN

OT

IN A

N M

SA

id=

0603

1100

4-1

(1-h

r)C

orre

latio

n=0.

38N

poss

=11

NG

OM

E=

11N

corr=

10

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Kin

gsN

OT

IN A

N M

SA

id=

0603

1100

4-1

(1-h

r)C

orre

latio

n=0.

23N

poss

=29

NG

OM

E=

29N

corr=

26

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

CA

Kin

gsN

OT

IN A

N M

SA

id=

0603

1100

4-1

(1-h

r)C

orre

latio

n=0.

07N

poss

=31

NG

OM

E=

31N

corr=

25

255

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

002-

2(1

-hr)

Cor

rela

tion=

0.29

Npo

ss=

26 N

GO

ME=

25N

corr=

25

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

002-

2(1

-hr)

Cor

rela

tion=

0.29

Npo

ss=

17 N

GO

ME=

16N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

002-

2(1

-hr)

Cor

rela

tion=

0.13

Npo

ss=

28 N

GO

ME=

28N

corr=

28

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

200

250

Surface NO2 (ppbv)

010203040

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

002-

2(1

-hr)

Cor

rela

tion=

0.00

Npo

ss=

26 N

GO

ME=

26N

corr=

24

256

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

016-

1(1

-hr)

Cor

rela

tion=

0.44

Npo

ss=

27 N

GO

ME=

26N

corr=

26

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

1201

-199

7022

8

Dec

02

1996

Dec

22

1996

Jan

1119

97Ja

n 31

1997

Feb

20

1997

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

016-

1(1

-hr)

Cor

rela

tion=

0.30

Npo

ss=

16 N

GO

ME=

15N

corr=

14

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

050100

150

Surface NO2 (ppbv)

05101520GOME NO2 (1X10

15 mol/cm

2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

016-

1(1

-hr)

Cor

rela

tion=

0.21

Npo

ss=

28 N

GO

ME=

28N

corr=

27

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

050100

150

200

250

Surface NO2 (ppbv)

010203040

GOME NO2 (1X1015

mol/cm2)

CA

Los

_Ang

eles

LOS

AN

GE

LES

-LO

NG

BE

AC

H, C

Aid

=06

0370

016-

1(1

-hr)

Cor

rela

tion=

0.01

Npo

ss=

27 N

GO

ME=

27N

corr=

27

257

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

ID A

daB

OIS

E C

ITY

, ID

id=

1600

1001

6-1

(1-h

r)C

orre

latio

n=0.

06N

poss

=18

NG

OM

E=

16N

corr=

15

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0301

-199

7053

1

Mar

12

1997

Apr

01

1997

Apr

21

1997

May

11

1997

May

31

1997

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

ID A

daB

OIS

E C

ITY

, ID

id=

1600

1001

6-1

(1-h

r)C

orre

latio

n=-0

.15

Npo

ss=

21 N

GO

ME=

15N

corr=

13

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

ID A

daB

OIS

E C

ITY

, ID

id=

1600

1001

6-1

(1-h

r)C

orre

latio

n=0.

25N

poss

=32

NG

OM

E=

29N

corr=

27

258

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1996

0901

-199

6113

0

Sep

13

1996

Oct

03

1996

Oct

23

1996

Nov

12

1996

050100

150

Surface NO2 (ppbv)

0510152025

GOME NO2 (1X1015

mol/cm2)

ID B

anno

ckP

OC

AT

ELL

O, I

Did

=16

0050

015-

1(1

-hr)

Cor

rela

tion=

0.18

Npo

ss=

21 N

GO

ME=

21N

corr=

21

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

Insu

ffici

ent C

oinc

iden

t Dat

aS

umm

er (

6/1/

97-8

/31/

97)

259

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

OR

Mul

tnom

ahP

OR

TLA

ND

-VA

NC

OU

VE

R, O

R-W

Aid

=41

0510

080-

1(1

-hr)

Cor

rela

tion=

0.00

Npo

ss=

24 N

GO

ME=

22N

corr=

17

260

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WA

Cla

rkP

OR

TLA

ND

-VA

NC

OU

VE

R, O

R-W

Aid

=53

0110

011-

1(1

-hr)

Cor

rela

tion=

0.85

Npo

ss=

24 N

GO

ME=

22N

corr=

10

261

Insu

ffici

ent C

oinc

iden

t Dat

aF

all (

9/1/

96-1

1/30

/96)

Insu

ffici

ent C

oinc

iden

t Dat

aW

inte

r (1

2/1/

96-2

/28/

97)

Insu

ffici

ent C

oinc

iden

t Dat

aS

prin

g (3

/1/9

7-5/

31/9

7)

EP

A S

urfa

ce a

nd G

OM

E C

olum

n N

O2

1997

0601

-199

7083

1

Jun

2019

97Ju

l 10

1997

Jul 3

019

97A

ug 1

919

97

020406080100

Surface NO2 (ppbv)

02468101214

GOME NO2 (1X1015

mol/cm2)

WA

Kin

gS

EA

TT

LE-B

ELL

EV

UE

-EV

ER

ET

T, W

Aid

=53

0330

080-

1(1

-hr)

Cor

rela

tion=

0.34

Npo

ss=

20 N

GO

ME=

19N

corr=

16

262

B Regional Mean Satellite and In-Situ Comparisons

This appendix contains the spatial correlations between measurements, means, and standarddeviations for each EPA region and season (fall 1996 through summer 1997). Only theregions where at least 10 coincidences occur for at least 10 ground stations per season areincluded. This ensures there will be at least 10 points in the mean and standard deviationpanels from which the correlation is computed. During winter only region 9 meets thiscriteria. In addition, regions 7 and 10 did not meet this criteria during any season.

263


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 01r=0.207303n=223


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 01r=0.0656337n=15


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 01r=-0.0241315n=15

264


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 02r=0.160768n=179


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 02r=0.0348815n=15


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 02r=0.540483n=15

265


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 03r=0.252622n=312


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 03r=0.403481n=26


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 03r=0.282086n=26

266


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 04r=0.214383n=300


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 04r=0.123214n=24


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 04r=0.293096n=24

267


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 05r=0.426501n=167


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 05r=0.543948n=13


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19960901-19961130Region 05r=-0.00508030n=13

268


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 06r=0.0815128n=410


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 06r=-0.395336n=27


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 06r=-0.643616n=27

269


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 08r=0.266065n=148


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 08r=-0.00217565n=11


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19960901-19961130Region 08r=0.596882n=11

270


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130Region 09r=0.456952n=2179


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130Region 09r=0.622159n=100


0 20 40 60 80GOME NO2 (1X1015 mol/cm2)

0

50

100

150

EP

A N

O2

(ppb

v)

19960901-19961130Region 09r=0.274312n=100

271


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228Region 09r=0.420386n=870


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228Region 09r=0.670749n=64


0 10 20 30 40GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

EP

A N

O2

(ppb

v)

19961201-19970228Region 09r=0.362785n=64

272


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 01r=0.362351n=152


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 01r=0.317665n=11


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 01r=0.647606n=11

273


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970301-19970531Region 02r=0.381621n=252


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970301-19970531Region 02r=-0.00482121n=14


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970301-19970531Region 02r=0.228667n=14

274


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 03r=0.300636n=384


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 03r=0.129371n=28


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 03r=0.554145n=28

275


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970301-19970531Region 04r=0.102346n=336


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970301-19970531Region 04r=0.0318305n=23


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970301-19970531Region 04r=0.357388n=23

276


0 5 10 15 20 25 30 35GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

70

EP

A N

O2

(ppb

v)

19970301-19970531Region 05r=0.199482n=214


0 5 10 15 20 25 30 35GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

70

EP

A N

O2

(ppb

v)

19970301-19970531Region 05r=0.385866n=17


0 5 10 15 20 25 30 35GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

70

EP

A N

O2

(ppb

v)

19970301-19970531Region 05r=0.329224n=17

277


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 06r=0.0983724n=265


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 06r=-0.0510302n=18


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970301-19970531Region 06r=-0.161297n=18

278


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531Region 09r=0.513003n=1960


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531Region 09r=0.664743n=94


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970301-19970531Region 09r=0.400904n=94

279


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 01r=0.299877n=242


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 01r=0.268488n=17


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 01r=0.476697n=17

280


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 02r=0.342713n=218


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 02r=0.562465n=15


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 02r=0.531099n=15

281


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 03r=0.172038n=545


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 03r=0.0132216n=34


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 03r=-0.218686n=34

282


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 04r=0.124706n=165


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 04r=-0.00764944n=13


0 5 10 15 20 25 30GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 04r=0.227110n=13

283


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 05r=0.333495n=306


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 05r=0.337968n=21


0 10 20 30GOME NO2 (1X1015 mol/cm2)

0

20

40

60

EP

A N

O2

(ppb

v)

19970601-19970831Region 05r=0.480621n=21

284


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 06r=0.0790267n=333


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 06r=0.0767838n=22


0 5 10 15 20 25GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

50

EP

A N

O2

(ppb

v)

19970601-19970831Region 06r=0.0708698n=22

285


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 08r=0.282583n=224


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 08r=0.437669n=14


0 5 10 15 20GOME NO2 (1X1015 mol/cm2)

0

10

20

30

40

EP

A N

O2

(ppb

v)

19970601-19970831Region 08r=0.205277n=14

286


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 09r=0.513140n=2081


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 09r=0.741452n=99


0 10 20 30 40 50GOME NO2 (1X1015 mol/cm2)

0

20

40

60

80

100

EP

A N

O2

(ppb

v)

19970601-19970831Region 09r=0.694049n=99

287

REPORT DOCUMENTATION PAGE Form ApprovedOMB No. 0704-0188

2. REPORT TYPE Technical Memorandum

4. TITLE AND SUBTITLE

Comparison of Satellite Observations of Nitrogen Dioxide to SurfaceMonitor Nitrogen Dioxide Concentration

5a. CONTRACT NUMBER

6. AUTHOR(S)

Kleb, Mary M.; Pippin, Margaret R.; Pierce, R. Bradley; Neil, Doreen O.;Lingenfelser, Gretchen; and Szykman, James J.

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)

NASA Langley Research CenterHampton, VA 23681-2199

9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)

National Aeronautics and Space AdministrationWashington, DC 20546-0001

8. PERFORMING ORGANIZATION REPORT NUMBER

L-19315

10. SPONSOR/MONITOR'S ACRONYM(S)

NASA

13. SUPPLEMENTARY NOTESAn electronic version can be found at http://ntrs.nasa.gov

12. DISTRIBUTION/AVAILABILITY STATEMENTUnclassified - UnlimitedSubject Category 45Availability: NASA CASI (301) 621-0390

19a. NAME OF RESPONSIBLE PERSON

STI Help Desk (email: [email protected])

14. ABSTRACTNitrogen dioxide is one of the U. S. EPA’s criteria pollutants, and one of the main ingredients needed for the production of ground-level ozone. Both ozoneand nitrogen dioxide cause severe public health problems. Existing satellites have begun to produce observational data sets for nitrogen dioxide. UnderNASA’s Earth Science Applications Program, we examined the relationship between satellite observations and surface monitor observations of this airpollutant to examine if the satellite data can be used to facilitate a more capable and integrated observing network. This report provides a comparison ofsatellite tropospheric column nitrogen dioxide to surface monitor nitrogen dioxide concentration for the period from September 1996 through August 1997 atmore than 300 individual locations in the continental US. We found that the spatial resolution and observation time of the satellite did not capture thevariability of this pollutant as measured at ground level. The tools and processes developed to conduct this study will be applied to the analysis of advancedsatellite observations. One advanced instrument has significantly better spatial resolution than the measurements studied here and operates with an afternoonoverpass time, providing a more representative distribution for once-per-day sampling of this photochemically active atmospheric constituent.

15. SUBJECT TERMSNitrogen dioxide, Nitrogen oxides, GOME, Air pollution, Earth Science data applications, Satellite data

18. NUMBER OF PAGES

29419b. TELEPHONE NUMBER (Include area code)

(301) 621-0390

a. REPORT

U

c. THIS PAGE

U

b. ABSTRACT

U

17. LIMITATION OF ABSTRACT

UU

Prescribed by ANSI Std. Z39.18Standard Form 298 (Rev. 8-98)

3. DATES COVERED (From - To)

5b. GRANT NUMBER

5c. PROGRAM ELEMENT NUMBER

5d. PROJECT NUMBER

5e. TASK NUMBER

5f. WORK UNIT NUMBER

389018.02.13.01.46

11. SPONSOR/MONITOR'S REPORT NUMBER(S)

NASA/TM-2006-214527

16. SECURITY CLASSIFICATION OF:

The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.

1. REPORT DATE (DD-MM-YYYY)

12 - 200601-

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