The NADP/NTN: Responding to new challenges
Conference
·
OSTI ID:617887
- Geological Survey, Denver, CO (United States)
- Colorado State Univ., Fort Collins, CO (United States)
The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) addresses the need for long-term, high quality data to determine spatial and temporal trends in atmospheric deposition. The NADP/NTN Network is the only long-term deposition monitoring program in the US with national coverage. On-line data and summaries for the network are available from the NADP/NTN coordination office via the internet World Wide Web site at http://nadp.nrel.colostate.edu/NADP. Full color US maps with isopleths of annual precipitation chemistry concentration and deposition are available as well as extensive site descriptions including photos, detailed descriptions of data parameters and comprehensive quality assurance information. In the 90`s, NADP/NTN sub-networks have evolved to address specialized needs for atmospheric deposition data at varying time scales and for mercury. The AIRMoN subnetwork provides precipitation chemistry data on an event or daily basis. The Mercury Deposition sub-network (MDN) provides weekly concentrations of total mercury in precipitation and the seasonal and annual flux of total mercury in wet deposition. Significant reductions in SO{sub 2} emissions mandated by the Clean Air Act Amendments occurred in 1995. Additional reductions of SO{sub 2} and NO{sub x} are scheduled to be implemented beginning in the year 2000. Continued operation of the NADP/NTN and its sub-networks are enabling scientists and regulators to evaluate the impact of these and other emission reduction programs on the chemical composition of precipitation in the United States.
- OSTI ID:
- 617887
- Report Number(s):
- CONF-970145--
- Country of Publication:
- United States
- Language:
- English
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