The National Atmospheric Deposition Program (NADP) is a collaboration of atmospheric monitoring networks. The purpose of the networks is to collect data to evaluate air quality. Network data also inform science-based actions to protect human health and preserve ecosystems for current and future generations.
The NADP National Trends Network (NTN) quantifies the concentration of eight major ions and acidity present in precipitation samples for 250 sites across the United States. The Mercury Deposition (MDN), Ammonia Monitoring (AMoN), Atmospheric Mercury (AMNET), and Mercury Litterfall (MLN) Networks comprise the other NADP networks.
The USGS has been an NADP partner agency since 1981 and participates by providing funds for 69 NTN sites. USGS also funds one MDN and one MLN site.
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USGS supports monitoring sites within the National Trends Network, Mercury Deposition Network, and Mercury Litterfall Network of the National Atmospheric Deposition Program.
Data from the NADP networks are used to track trends and examine spatial patterns in atmospheric deposition of chemical elements that include nitrogen, sulfur, mercury, calcium, and others. Many of these chemical elements are naturally present in the atmosphere but also originate in part as air pollutant emissions from human activities including power plants and vehicles.
Policies implemented under the Clean Air Act, as part of global treaties, and by other regulations typically set targets for reducing emissions. Changes in air pollutant emissions are tracked by NADP measurements. Therefore, there is a close link between science, policy, and management at the heart of the NADP.
Site operators collect samples following approved methods. The NADP Analytical Laboratory (NAL) analyzes the samples using consistent methods. This facilitates comparisons across sites and ensures consistent data for evaluation of long-term trends in deposition chemistry.
The USGS participation in the NADP is funded by the National Water Quality Program.
Annual gradient maps
Since 1985, the NADP has created annual gradient maps of precipitation-weighted mean concentrations and deposition for several different chemical elements.
► More about the NADP data, program, and networks
Below are data associated with National Atmospheric Deposition Program (NADP).
Scientists use National Atmospheric Deposition Program (NADP) data to investigate nitrogen sources to watersheds and estuaries, ecosystem effects of pollutant deposition, and results of implementation of clean air policies.
Atmospheric Deposition Program of the U.S. Geological Survey
External quality-assurance project report for the National Atmospheric Deposition Program/National Trends Network and Mercury Deposition Network, 2009-2010
U.S. Geological Survey external quality-assurance project report for the National Atmospheric Deposition Program / National Trends Network and Mercury Deposition Network, 2011-2012
Instrumental neutron activation analysis data for cloud-water particulate samples, Mount Bamboo, Taiwan
Effects of equipment performance on data quality from the National Atmospheric Deposition Program/National Trends Network and the Mercury Deposition Network
Fluvial transport of mercury, organic carbon, suspended sediment, and selected major ions in contrasting stream basins in South Carolina and New York, October 2004 to September 2009
Mercury bioaccumulation studies in the National Water-Quality Assessment Program--biological data from New York and South Carolina, 2005-2009
Fission products in National Atmospheric Deposition Program—Wet deposition samples prior to and following the Fukushima Dai-Ichi Nuclear Power Plant incident, March 8?April 5, 2011
A caveat regarding diatom-inferred nitrogen concentrations in oligotrophic lakes
Four studies on effects of environmental factors on the quality of National Atmospheric Deposition Program measurements
Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
Mercury in Indiana watersheds: Retrospective for 2001–2006
DayCent-Chem simulations of ecological and biogeochemical processes of eight mountain ecosystems in the United States
The National Atmospheric Deposition Program (NADP) is a collaboration of atmospheric monitoring networks. The purpose of the networks is to collect data to evaluate air quality. Network data also inform science-based actions to protect human health and preserve ecosystems for current and future generations.
The NADP National Trends Network (NTN) quantifies the concentration of eight major ions and acidity present in precipitation samples for 250 sites across the United States. The Mercury Deposition (MDN), Ammonia Monitoring (AMoN), Atmospheric Mercury (AMNET), and Mercury Litterfall (MLN) Networks comprise the other NADP networks.
The USGS has been an NADP partner agency since 1981 and participates by providing funds for 69 NTN sites. USGS also funds one MDN and one MLN site.
Quick Links
USGS supports monitoring sites within the National Trends Network, Mercury Deposition Network, and Mercury Litterfall Network of the National Atmospheric Deposition Program.
Data from the NADP networks are used to track trends and examine spatial patterns in atmospheric deposition of chemical elements that include nitrogen, sulfur, mercury, calcium, and others. Many of these chemical elements are naturally present in the atmosphere but also originate in part as air pollutant emissions from human activities including power plants and vehicles.
Policies implemented under the Clean Air Act, as part of global treaties, and by other regulations typically set targets for reducing emissions. Changes in air pollutant emissions are tracked by NADP measurements. Therefore, there is a close link between science, policy, and management at the heart of the NADP.
Site operators collect samples following approved methods. The NADP Analytical Laboratory (NAL) analyzes the samples using consistent methods. This facilitates comparisons across sites and ensures consistent data for evaluation of long-term trends in deposition chemistry.
The USGS participation in the NADP is funded by the National Water Quality Program.
Annual gradient maps
Since 1985, the NADP has created annual gradient maps of precipitation-weighted mean concentrations and deposition for several different chemical elements.
► More about the NADP data, program, and networks
Below are data associated with National Atmospheric Deposition Program (NADP).
Scientists use National Atmospheric Deposition Program (NADP) data to investigate nitrogen sources to watersheds and estuaries, ecosystem effects of pollutant deposition, and results of implementation of clean air policies.