1. Measuring Atmospheric N Inputs
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
Clean Air Status and Trends Network (CASTNet) Site CTH 110
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.
Weekly dry deposition including gaseous HNO3 & particulate NO3- and NH4+
National Atmospheric Deposition Program (NADP/AIRMoN Site NY67)
Daily precipitation chemistry for NO3- and NH4+ as well as other ionic species
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
NOx emissions impacting area
MARGA Output (also measures particulate NH4+ and NO3-)
Cooperative State Research, Education, and Extension Service