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National Atmospheric Deposition Program
Wet Deposition Observations Along the Gulf Coast
Prepared by David Gay, Chris Lehmann, Bob Brunette
July 28, 2010217.244.0462, dgay@illinois.edu, http://nadp.isws.illinois.edu/
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National Atmospheric Deposition NetworkMercury Deposition Network
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Trajectories from the Blowout Location
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Forward Trajectories from the Blowout LocationEvery 12 hours, times in GMT
Approximate time of blowout and fire
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Mercury Deposition Network Data
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44 - 66 - 88 - 1010 - 1212 - 1414 - 1616 - 18> 18
Hg(ng/L)
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12.7
13.1
17.714.7
12.6
8
7
4
5
9
14
34
18
15
5.9
9.9
8.1
7.7
6.7
6.75.7
7.9
7.4
3.3
5.3
6.84.9
7.7
6.5
8.5
6.36.4
8.4
2.1
6.8 8.2
5.9
6.7
6.6
7.4
7.2
6.1
1.9
6.8
9.1
9.7
9.9
7.6
5.7
5.46.6
5.8
6.6
4.5
5.65.2
6.6
8.5
6.2
7.7
9.1
9.9
7.1
6.5
7.44.4
4.3
4.85.7
4.4
7.45.8
6.3
4.1 4.5
8.3
7.5
9.5
7.8
9.1
7.9
8.1
7.8
9.7
8.1
7.6
8.6
9.8
8.7
7.9
4.8
3.7
3.6
8.9
7.8
8.9
10.5
19.5
11.4
12.9
11.510.3
15.7
24.9
14.6
16.1 13.4
10.5
13.1
11.611.2
10.2
11.4 11.8
10.616.7
14.8
12.4
31.514.8
31.2
Slide 8
Mercury Deposition Network2009 Annual Average
2010 Mid-April through June
concentrations
Provisional Data:Do not cite
Slide 9
Site
2009 Concentration
ng/L
2010 Concentration
ng/L
Concentration Change2010-2009 Change %
FL98 12.6
LA05 12.8 14.7 1.9 15%
LA28 17.0 17.7 0.7 4%
FL05 11.8 13.1 1.3 11%
MS22 8.4 15.0 6.6 78%
MS12 12.7
Mercury Deposition Network2010 (mid April – June) vs. 2009
Provisional Data:Do not cite
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Provisional Data:Do not cite
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Provisional Data:Do not cite
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Blowout Week Deposition vs. All Observations
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Blowout Week Deposition vs. All Spring Observations
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Blowout Week Deposition vs. All Low-Precipitation
Spring Observations
<1inch, LA28 only
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National Trends Network Data
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0
20
40
60
80
100
20
25
30
35
40
45
50
Precipitatio
n Depth, m
m
oncentratio
n) / (3‐Year A
verage)
Ion Concentrations in PrecipitationIberia Research Station (LA12)
0
5
10
15
20
Ratio
: (Sample Co Ca
Mg
K
Na
NH4
NO3
Cl
SO4
SubPPt
National Trends Network: http://nadp.isws.illinois.edu
16Provisional Data: Do not cite
20
0
20
40
60
80
100
8
10
12
14
16
18
20
Precipitatio
n Depth, m
m
oncentratio
n) / (3‐Year A
verage)
Ion Concentrations in PrecipitationIberia Research Station (LA12)
0
2
4
6
8
Ratio
: (Sample Co
NH4
NO3
SO4
SubPPt
National Trends Network: http://nadp.isws.illinois.edu
17Provisional Data: Do not cite
10050
Ion Concentrations in PrecipitationSoutheast Research Station (LA30)
60
80
40
45
epth, m
m
)
20
40
60
30
35
40
Precipita
tion D
e
(3‐Year A
verage)
0
20
25
30
oncentratio
n) / (
15
20
atio: (Sam
ple Co Ca
Mg
K
Na
5
10Ra NH4
NO3
Cl
SO4
0 SubPPt
National Trends
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contamination
Provisional Data: Do not cite
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0
20
40
60
80
100
8
10
12
14
16
18
20
Precipitatio
n Depth, m
m
oncentratio
n) / (3‐Year A
verage)
Ion Concentrations in PrecipitationSoutheast Research Station (LA30)
0
2
4
6
8
Ratio
: (Sample Co
NH4
NO3
SO4
SubPPt
National Trends Network: http://nadp.isws.illinois.edu
19Provisional Data: Do not cite
0
20
40
60
80
100
0 4
0.5
0.6
0.7
0.8
0.9
1
Precipitatio
n Depth, m
m
Wet Deposition
(kg/ha)
Ion Wet DepositionSoutheast Research Station (LA30)
0
0.1
0.2
0.3
0.4
Total W
NH4Dep
NO3Dep
SO4Dep
SubPPt
National Trends Network: http://nadp.isws.illinois.edu
20Provisional Data: Do not cite
21Provisional Data: Do not cite
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Blowout Week Sulfate Deposition vs. All Observations
Slide 23
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Blowout Week Sulfate Deposition vs. All Spring Observations
Slide 25
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Blowout Week Deposition vs. All Spring Observations
w/less than 1 inch rainfall
Slide 27
Change in sulfate ion concentration, 2009-2010 (microequivalents per liter)Six week period mid-April through May; all sites have a minimum of four data points within each 6 week period.
Six-Week Deposition Changes, 2010 vs. 2009
Slide 28
Provisional Data: Do not cite
Change in sulfate ion concentration, 2009-2010 (percent)Six week period mid-April through May; all sites have a minimum of four data points within each 6 week period.
Slide 29
Provisional Data: Do not cite
Change in nitrogen concentration, 2009-2010 (microequivalents per liter)Sum of nitrate plus ammonium ion. Six week period mid-April through May; all sites have a minimum of four data points within each 6 week period.
Slide 30
Provisional Data: Do not cite
Change in sulfate ion concentration, 2009-2010 (percent)Six week period mid-April through May; all sites have a minimum of four data points within the 6 week period.
Slide 31
Provisional Data: Do not cite