NADP (National Atmospheric Deposition Program) 2003 Long-Term Monitoring: Supporting and Science and Informing ahd Technical Committee Meeting held on October 20-22, 2003 at Washington, D.C. and the Ammonia Workshhop held on October 23-23, 2003 at Washin

摘要

The NADP is a National Research Support Project with nearly 250 cooperators (federal, state, local and tribal agencies; State Agricultural Experiment Stations; universities; and non-governmental organizations). The program is recognized internationally for long-term, high-quality measurements of precipitation chemistry. Precipitation is collected at 250 National Trends Network (NTN) sites across the continental United States, Alaska, Hawaii, Puerto Rico, and the Virgin Islands. Data from NTN sites are used to evaluate temporal trends and geographic distributions of atmospheric chemical deposition, as well as to support research on the potential impacts of this deposition on terrestrial and aquatic ecosystems. The NADP also includes a 10-site research network, the Atmospheric Integrated Research Monitoring Network (AIRMoN), which collects daily samples, evaluates new methodologies, and examines the relationships between pollutant sources and deposition; and it includes the Mercury Deposition Network (MDN), measuring the total mercury in precipitation at nearly 70 sites in the United States and Canada.