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U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2021 – 2022

Dates

Publication Date
Start Date
2021-01-01
End Date
2022-12-31

Citation

Wetherbee, G.A., 2023, U.S. Geological Survey Precipitation Chemistry Quality Assurance Project Data 2021 – 2022: U.S. Geological Survey data release, https://doi.org/10.5066/P9OZ5GL1.

Summary

The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) was initiated in 1978 by the Association of State Agricultural Experiment Stations to monitor long-term atmospheric chemistry and the effects pollutants have on aquatic and terrestrial systems. As of fall 2023, precipitation was being collected at approximately 260 NTN sites in the United States, including Puerto Rico and the U.S. Virgin Islands, and additionally Bermuda and Canada. Beginning in 1996, the NADP/Mercury Deposition Network (MDN) has monitored mercury (Hg) in precipitation, and includes approximately 80 sites in the United States including Puerto Rico, plus Canada and Taiwan. The U.S. Geological Survey started the Precipitation Chemistry Quality [...]

Contacts

Point of Contact :
Gregory A Wetherbee
Process Contact :
Gregory A Wetherbee
Originator :
Gregory A Wetherbee
Metadata Contact :
Gregory A Wetherbee
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Observing Systems Division
USGS Mission Area :
Water Resources

Attached Files

Click on title to download individual files attached to this item.

NTN_Interlab_2021-2022_Data_Rev1.csv
“NTN_Interlab_2021-2022_Data_Rev1.csv”
84.9 KB text/csv
MDN_Interlab_2021-2022_Data_Rev1.csv
“MDN_Interlab_2021-2022_Data_Rev1.csv”
19.28 KB text/csv
Field_Audit_2021-2022_Data_Rev1.csv
“Field_Audit_2021-2022_Data_Rev1.csv”
28.86 KB text/csv
System_Blank_2021-22_Data_Rev1.csv
“System_Blank_2021-22_Data_Rev1.csv”
4.31 KB text/csv
Co-located_Sampler_Program_Data_2021-22.csv
“Co-located_Sampler_Program_Data_2021-22.csv”
48.12 KB text/csv

Material Request Instructions

For more information, contact the USGS, Water Mission Area, Observing Systems Division Director: https://www.usgs.gov/staff-profiles/janice-fulford.

Purpose

The Precipitation Chemistry Quality Assurance Project (PCQA) results gives users of National Atmospheric Deposition Program (NADP) data the assurance that measurements are representative of environmental conditions. The PCQA programs test the NADP measurements to ensure that the data are of sufficient quality for use in identification and quantification of spatial and temporal trends in atmospheric wet-deposition chemistry. These data are for a quality-control testing project. Therefore, most of these data are not representative measurements of the environment and should not be used as such, except for the Co-located Sampler data, which are true environmental measurements. Test solutions were prepared in the USGS Quality Systems Branch for the USGS Hydrologic Networks Branch in Bldg. 95, Room 2471 at the Denver Federal Center, Denver, Colorado. Test solutions were shipped to NADP sites for processing, and then the processed samples were shipped to the NADP laboratories at the University of Wisconsin, Madison for chemical analysis. Test solutions were also split among several identical, clean bottles and sent to chemical analysis laboratories, including the NADP laboratories for inter-laboratory comparison. Co-located samplers were installed at existing NADP National Trends Network sites to collect replicate weekly composite samples of precipitation for evaluation of the overall variability in NADP chemical data. All data were returned to the USGS Precipitation Chemistry Quality Assurance Project for compilation, assessment of results, permanent curation, and communication to the NADP and general public. The PCQA programs are continually evolving as described in the USGS reports, including: 1. Programs and Analytical Methods for the U.S. Geological Survey Acid Rain Quality-Assurance Project (See and others, 1990); 2. USGS Open-File Report 2005-1024, External Quality-Assurance Programs Managed by the U.S. Geological Survey in Support of the National Atmospheric Deposition Program/National Trends Network (Latysh and Wetherbee, 2005); 3. USGS Open-File Report 2007-1170, External Quality Assurance Programs Managed by the U.S. Geological Survey in Support of the National Atmospheric Deposition Program/Mercury Deposition Network (Latysh and Wetherbee, 2007); and 4. USGS Open-File Report 2016-1213, Updated Operational Protocols for the U.S. Geological Survey Precipitation Chemistry Quality Assurance Project in Support of the National Atmospheric Deposition Program (Wetherbee and Martin, 2017).

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Communities

  • USGS Data Release Products

Tags

Provenance

Water Mission Area, Observing Systems Division, Hydrologic Networks Branch, Precipitation Chemistry QA Project

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P9OZ5GL1

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