John D Gordon (Former Employee)
Science and Products
Filter Total Items: 13
External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1997-99 External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1997-99
Five external quality-assurance programs were operated by the U.S. Geological Survey for the National Atmospheric Deposition Program/ National Trends Network (NADP/NTN) during 1997 through 1999: the intersite-comparison program, the blind-audit program, the field- audit program, the interlaboratory-comparison program, and the collocated-sampler program. The intersite-comparison program...
Authors
John D. Gordon, Natalie E. Latysh, Sandy J. Lindholm
Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program
The National Atmospheric Deposition Program (NADP) was established in 1977 to investigate atmospheric deposition and its effects on the environment. Since its establishment, precipitation records have been obtained at all NADP sites using a gage developed approximately 50 years ago-the Belfort 5-780 mechanical rain gage. In 1998 and 1999, a study was done by the U.S. Geological Survey to...
Authors
John D. Gordon
Laboratory performance in the Sediment Laboratory Quality-Assurance Project, 1996-98 Laboratory performance in the Sediment Laboratory Quality-Assurance Project, 1996-98
This report describes the results of the first 3 years of an ongoing study of sediment laboratories used by the U.S. Geological Survey (USGS). The sediment laboratories currently in operation constitute the entire USGS national laboratory system for sediment analyses. As with all environmental data, physical sediment data can be expected to contain a certain amount of difference, whether...
Authors
John D. Gordon, Carla A. Newland, Shane T. Gagliardi
U.S. Geological Survey Quality-Assurance Project for Sediment Analysis U.S. Geological Survey Quality-Assurance Project for Sediment Analysis
Introduction Sediment is derived primarily from natural weathering of rock and is an assemblage of individual mineral grains that are then deposited by some physical agent, such as water, wind, ice, or gravity (Fetter, 1988). The U.S. Geological Survey (USGS) samples sediments and collects data on the amount of sediment in selected waterways. The most pressing sediment-related problems...
Authors
John D. Gordon, Carla Newland
External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96 External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96
The U.S. Geological Survey operated four external quality-assurance programs for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) in 1995 and 1996: the intersite-comparison program, the blind-audit program, the interlaboratory- comparison program, and the collocated-sampler program. The intersite-comparison program assessed the precision and bias of pH and...
Authors
John D. Gordon
USGS ensures quality of acid rain network USGS ensures quality of acid rain network
No abstract available.
Authors
Mark A. Nilles, John D. Gordon
Science and Products
Filter Total Items: 13
External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1997-99 External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1997-99
Five external quality-assurance programs were operated by the U.S. Geological Survey for the National Atmospheric Deposition Program/ National Trends Network (NADP/NTN) during 1997 through 1999: the intersite-comparison program, the blind-audit program, the field- audit program, the interlaboratory-comparison program, and the collocated-sampler program. The intersite-comparison program...
Authors
John D. Gordon, Natalie E. Latysh, Sandy J. Lindholm
Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program Evaluation of candidate rain gages for upgrading precipitation measurement tools for the National Atmospheric Deposition Program
The National Atmospheric Deposition Program (NADP) was established in 1977 to investigate atmospheric deposition and its effects on the environment. Since its establishment, precipitation records have been obtained at all NADP sites using a gage developed approximately 50 years ago-the Belfort 5-780 mechanical rain gage. In 1998 and 1999, a study was done by the U.S. Geological Survey to...
Authors
John D. Gordon
Laboratory performance in the Sediment Laboratory Quality-Assurance Project, 1996-98 Laboratory performance in the Sediment Laboratory Quality-Assurance Project, 1996-98
This report describes the results of the first 3 years of an ongoing study of sediment laboratories used by the U.S. Geological Survey (USGS). The sediment laboratories currently in operation constitute the entire USGS national laboratory system for sediment analyses. As with all environmental data, physical sediment data can be expected to contain a certain amount of difference, whether...
Authors
John D. Gordon, Carla A. Newland, Shane T. Gagliardi
U.S. Geological Survey Quality-Assurance Project for Sediment Analysis U.S. Geological Survey Quality-Assurance Project for Sediment Analysis
Introduction Sediment is derived primarily from natural weathering of rock and is an assemblage of individual mineral grains that are then deposited by some physical agent, such as water, wind, ice, or gravity (Fetter, 1988). The U.S. Geological Survey (USGS) samples sediments and collects data on the amount of sediment in selected waterways. The most pressing sediment-related problems...
Authors
John D. Gordon, Carla Newland
External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96 External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96
The U.S. Geological Survey operated four external quality-assurance programs for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) in 1995 and 1996: the intersite-comparison program, the blind-audit program, the interlaboratory- comparison program, and the collocated-sampler program. The intersite-comparison program assessed the precision and bias of pH and...
Authors
John D. Gordon
USGS ensures quality of acid rain network USGS ensures quality of acid rain network
No abstract available.
Authors
Mark A. Nilles, John D. Gordon