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3.6. WINTERTIME TETHERED BALLOON MEASUREMENTS OF METEOROLOGICAL VARAIBLES AND AEROSOLS IN SUPPORT OF MANE-VU 2004. - PowerPoint PPT Presentation
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WINTERTIME TETHERED BALLOON MEASUREMENTS OF METEOROLOGICAL VARAIBLES AND AEROSOLS IN SUPPORT OF MANE-VU 2004 Richard D. Clark * , Dennis M. O’Donnell, Kevin N. Berberich, Chris J. Homan, Daniel T. Brewer, Evan M. Lowery, Jennifer E. Bunting, Courtney L. Hanna, Maureen T. Maiuri, John E. Yorks Department of Earth Sciences (Meteorology) Millersville University of Pennsylvania, Millersville, Pennsylvania 13 th Conference on the Applications of Air Pollution Meteorology with the Air and Waste Management Association: 3 . 6
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Page 1: 3.6

WINTERTIME TETHERED BALLOON MEASUREMENTS OF METEOROLOGICAL

VARAIBLES AND AEROSOLS IN SUPPORT OF MANE-VU 2004

Richard D. Clark*, Dennis M. O’Donnell, Kevin N. Berberich, Chris J. Homan, Daniel T. Brewer, Evan M. Lowery, Jennifer E. Bunting,

Courtney L. Hanna, Maureen T. Maiuri, John E. Yorks

Department of Earth Sciences (Meteorology)

Millersville University of Pennsylvania, Millersville, Pennsylvania13th Conference on the Applications of Air Pollution Meteorology with the Air and Waste

Management Association: Session 3, Aerosol Measurement and Modeling.

Monday, 23 August 2004

3.6

Page 2: 3.6

• Introduction• Data Collection• Overview of Winter

2004• Case Studies• Key Elements• Conclusions• Future Work

Page 3: 3.6

Introduction: Why study the wintertime boundary layer?

• Studies of the WBL and its chemistry are rare; long-duration aloft measurements are virtually non-existent

• Dynamics and thermodynamics are very different than summertime

• Synoptic gradients can easily overwhelm local and regional effects, but…

• Strong static stability can lead to stratification and a rapid enhancement of local and regional effects

• There is a need for high resolution wintertime profiles for modeling comparison and validation

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Data Collection

• 6 Weeks from 3 January – 14 February 2004

• Lat. 39° 59.43’ N; Lon. 076° 23.16’ W; Elev. 100 m MSL

• Class I visibility area in the MANE-VU domain located 16.2 km SW of the Lancaster, PA airport

• Semi-rural, agricultural setting typical of the region

• Pittsburgh 300 km to the west, New York City 150 km to the northeast, and Baltimore and Philadelphia with a 100 km radius to the south and east respectively. Lancaster, PA (pop. 50,000) 9 km east of the site

• Representative of the mid-Atlantic piedmont area about halfway distant between the Atlantic coastal plain and the Appalachian Mountains

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Data Collection: Platforms• Two 12 m3 balloons each with 7.5 kg payload

capacity• Blimp (top) used for vertical profiling to 750 m

AGL• Balloon (bottom) used for constant altitude

time series at designated “altitudes of interest.” Daily Number of Vertical Profiles During MANE-VU 2004

0

2

4

6

8

10

12

14

16

1/8

1/9

1/1

0

1/1

1

1/1

2

1/1

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1/1

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0

2/1

1

2/1

2

2/1

3

Date

Nu

mb

ne

r o

f S

ou

nd

ing

s

Constant Altitude Time Aloft During MANE_VU 2004

0

200

400

600

800

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1200

1400

1/2

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0

2/1

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2/1

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2/1

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Date

Min

ute

s

120 profiles

87 hours

1 2 3 4 5 6

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Data Collection: Instruments

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Overview of Winter 2004: Climatology January was the 10th coldest on record in the mid-Atlantic region with a -6 F departure from normal.The month was also drier than normal with only 30% of normal precipitationIn February both temperature and precipitation returned to near normal valuesFirst half of February temperature was still -2 F below normal and precipitation was twice normalFrom 3 January - 14 February 2004, the site experienced temperature departures of -6.6 F from normal and 9.6 mm above normal precipitation

The January thaw was absent in 2004 in the mid-Atlantic region

JANUARY

FEBRUARY

Page 8: 3.6

Overview of Winter 2004: Synoptic Conditions

17 Jan 04

00 UTC

• January characterized by progressive wave short pattern

• Rapid exchange of air masses

• Influx of air from the Canadian Provinces

• Coupling of the subtropical and polar jets

• Strong baroclinicity

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Overview of Winter 2004: Synoptic Conditions

7 Feb 04

18 UTC

• Significant pattern change in late January (~ 27th)

• Mean trough established in Midwest

• Influx of air from south-central US and Gulf of Mexico

• Temperature and moisture more seasonal

• Strong baroclinicity continues

Page 10: 3.6

Case Studies: 2 FEB 2004 (daytime progressive anticyclone)

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Case Studies: 2 FEB 2004

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Case Studies: 2 FEB 2004

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Case Studies: 2 FEB 2004

Missing CPC/DT

Page 14: 3.6

Case Studies: 2 FEB 2004

Missing CPC/DT

Page 15: 3.6

Case Studies: 2 FEB 2004

Surface Quantities

Page 16: 3.6

Case Studies: 5 FEB 2004 (nighttime stratification)

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Case Studies: 5 FEB 2004

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Case Studies: 5 FEB 2004

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Case Studies: 5 FEB 2004

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Case Studies: 5 FEB 2004

Page 21: 3.6

Case Studies: 5 FEB 2004

Surface Quantities

Page 22: 3.6

Case Studies: 5 FEB 2004

Surface Meteorology


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