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Cooperative State Research, Education, and Extension Service. Agricultural Ecology Program: Understanding sources and sinks of nutrients and sediment in the upper Susquehanna River basin. Connecticut Hill Atmospheric and Precipitation Chemistry Research and Monitoring Facility - PowerPoint PPT Presentation
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Data to be collected for this project
Improve measurement of dry deposition of N, especially gaseous NO2, NH3. At least 1/3 of the measured total N
deposition at the sites is in theform of dry deposition, but not all components have been measured yet.
MARGA (Monitoring instrument for aerosols and gases; see box at left) hourly sampling for gaseous NH3, HNO3, and
HNO2, and particulate NH4+ and NO3
-; ThermoElectron 42C-
Y chemiluminescence detector for hourly sampling for NOy
Passive gas sampler monitoring for dry deposition of NH3,
NO2, NOx, HNO3
Comparison of data from passive samplers and CASTNet filter packs
Further tests of spatial variability of dry deposition components
Agricultural Ecology Program: Understanding sources and sinks of
nutrients and sediment in the upper Susquehanna River basin
Connecticut Hill Atmospheric and Precipitation Chemistry Research and Monitoring Facility
Measuring Atmospheric N Inputs
The site is one of the longest operating wet and dry deposition sites in the U.S. Designed to be regionally representative, the 6 ha site is located near the 4500 ha NYS Conn. Hill Game Management Area. Both the landscape and land use are typical of other headwater sections of the Susquehanna River watershed in New York State.
NOx emissions impacting area
National Atmospheric Deposition Program (NADP/AIRMoN Site NY67)
Daily precipitation chemistry for NO3- and NH4
+ as well as other ionic species
Clean Air Status and Trends Network (CASTNet) Site CTH 110
NOx Emissions, 31 Eastern States
0
2
4
6
8
10
12
14
16
18
19911992
19931994
19951996
19971998
19992000
2001
NO
x E
mis
sio
ns
(mill
ion
met
ric
ton
s)
Other 20.2%
Electric 25.4%
Vehicle 54.4%
Total
NO3- (μeq/L)
y = -0.3775x + 778.9
R2 = 0.575
0
5
10
15
20
25
30
35
40
1975 1980 1985 1990 1995 2000 2005
Precipitation (cm)
y = 0.4463x - 780.81
R2 = 0.0522
0
20
40
60
80
100
120
140
160
1975 1980 1985 1990 1995 2000 2005
NH4+ (ueq/L)
y = -0.0079x + 31.833
R2 = 0.0012
0
5
10
15
20
25
1975 1980 1985 1990 1995 2000 2005
Cooperative State Research, Education, and Extension Service
Marga Sample Data: Diurnal Variation at Beltsville, MD
0
0.5
1
1.5
2
2.5
1 3 5 7 9 11 13 15 17 19 21 23
hourly pattern, 16-18 June 2005
ug/m
3
HCl
HNO2
HNO3
NH3
MARGA Output (also measures particulate NH4
+ and NO3-)
Weekly drydepositionincludinggaseous HNO3
& particulateNO3
- and NH4+