David W Clow (Former Employee)
Science and Products
Filter Total Items: 72
Old groundwater influence on stream hydrochemistry and catchment response times in a small Sierra Nevada catchment: Sagehen Creek, California Old groundwater influence on stream hydrochemistry and catchment response times in a small Sierra Nevada catchment: Sagehen Creek, California
The relationship between the chemical and isotopic composition of groundwater and residence times was used to understand the temporal variability in stream hydrochemistry in Sagehen basin, California. On the basis of the relationship between groundwater age and [Ca2+], the mean residence time of groundwater feeding Sagehen Creek during base flow is approximately 28 years. [Cl−]:[Ca2+]...
Authors
Laura K. Rademacher, Jordan F. Clark, David W. Clow, Hudson G. Bryant
Rocky Mountain Snowpack Chemistry at Selected Sites, 2002 Rocky Mountain Snowpack Chemistry at Selected Sites, 2002
During spring 2002, the chemical composition of annual snowpacks in the Rocky Mountain region of the Western United States was analyzed. Snow samples were collected at 75 geographically distributed sites extending from New Mexico to Montana. Near the end of the 2002 snowfall season, the snow-water equivalent (SWE) in annual snowpacks sampled generally was below average in most of the...
Authors
George P. Ingersoll, M. Alisa Mast, Leora Nanus, David J. Manthorne, David W. Clow, Heather M. Handran, Jesse A. Winterringer, Donald H. Campbell
Rocky Mountain snowpack chemistry at selected sites for 2001 Rocky Mountain snowpack chemistry at selected sites for 2001
Because regional-scale atmospheric deposition data in the Rocky Mountains are sparse, a program was designed by the U.S. Geological Survey, in cooperation with the National Park Service, U.S. Department of Agriculture Forest Service, and other agencies, to more thoroughly determine the chemical composition of precipitation and to identify sources of atmospherically deposited contaminants...
Authors
George P. Ingersoll, M. Alisa Mast, David W. Clow, Leora Nanus, Donald H. Campbell, Heather Handran
Evidence for nutrient enrichment of high-elevation lakes in the Sierra Nevada, California Evidence for nutrient enrichment of high-elevation lakes in the Sierra Nevada, California
Long-term measurements (1983-2001) of nutrients and seston in Emerald Lake (Sierra Nevada, California) have revealed ecologically significant patterns. Nitrate, both during spring runoff and during growing seasons, declined from 1983 through 1995. Declining snowmelt nitrate was caused primarily by changes in snow regime induced by the 1987-1992 drought: years with shallow, early melting...
Authors
James O. Sickman, John M. Melack, David W. Clow
Changes in the chemistry of lakes and precipitation in high-elevation national parks in the western United States, 1985–1999 Changes in the chemistry of lakes and precipitation in high-elevation national parks in the western United States, 1985–1999
High-elevation lakes in the western United States are sensitive to atmospheric deposition of sulfur and nitrogen due to fast hydrologic flushing rates, short growing seasons, an abundance of exposed bedrock, and a lack of well-developed soils. This sensitivity is reflected in the dilute chemistry of the lakes, which was documented in the U.S. Environmental Protection Agency's Western...
Authors
David W. Clow, James O. Sickman, Robert G. Striegl, David P. Krabbenhoft, John G. Elliott, Mark M. Dornblaser, David A. Roth, Donald H. Campbell
Rocky Mountain snowpack chemistry network: History, methods, and the importance of monitoring mountain ecosystems Rocky Mountain snowpack chemistry network: History, methods, and the importance of monitoring mountain ecosystems
Because regional-scale atmospheric deposition data in the Rocky Mountains are sparse, a program was designed by the U.S. Geological Survey to more thoroughly determine the quality of precipitation and to identify sources of atmospherically deposited pollution in a network of high-elevation sites. Depth-integrated samples of seasonal snowpacks at 52 sampling sites, in a network from New...
Authors
George P. Ingersoll, John T. Turk, M. Alisa Mast, David W. Clow, Donald H. Campbell, Zelda C. Bailey
Science and Products
Filter Total Items: 72
Old groundwater influence on stream hydrochemistry and catchment response times in a small Sierra Nevada catchment: Sagehen Creek, California Old groundwater influence on stream hydrochemistry and catchment response times in a small Sierra Nevada catchment: Sagehen Creek, California
The relationship between the chemical and isotopic composition of groundwater and residence times was used to understand the temporal variability in stream hydrochemistry in Sagehen basin, California. On the basis of the relationship between groundwater age and [Ca2+], the mean residence time of groundwater feeding Sagehen Creek during base flow is approximately 28 years. [Cl−]:[Ca2+]...
Authors
Laura K. Rademacher, Jordan F. Clark, David W. Clow, Hudson G. Bryant
Rocky Mountain Snowpack Chemistry at Selected Sites, 2002 Rocky Mountain Snowpack Chemistry at Selected Sites, 2002
During spring 2002, the chemical composition of annual snowpacks in the Rocky Mountain region of the Western United States was analyzed. Snow samples were collected at 75 geographically distributed sites extending from New Mexico to Montana. Near the end of the 2002 snowfall season, the snow-water equivalent (SWE) in annual snowpacks sampled generally was below average in most of the...
Authors
George P. Ingersoll, M. Alisa Mast, Leora Nanus, David J. Manthorne, David W. Clow, Heather M. Handran, Jesse A. Winterringer, Donald H. Campbell
Rocky Mountain snowpack chemistry at selected sites for 2001 Rocky Mountain snowpack chemistry at selected sites for 2001
Because regional-scale atmospheric deposition data in the Rocky Mountains are sparse, a program was designed by the U.S. Geological Survey, in cooperation with the National Park Service, U.S. Department of Agriculture Forest Service, and other agencies, to more thoroughly determine the chemical composition of precipitation and to identify sources of atmospherically deposited contaminants...
Authors
George P. Ingersoll, M. Alisa Mast, David W. Clow, Leora Nanus, Donald H. Campbell, Heather Handran
Evidence for nutrient enrichment of high-elevation lakes in the Sierra Nevada, California Evidence for nutrient enrichment of high-elevation lakes in the Sierra Nevada, California
Long-term measurements (1983-2001) of nutrients and seston in Emerald Lake (Sierra Nevada, California) have revealed ecologically significant patterns. Nitrate, both during spring runoff and during growing seasons, declined from 1983 through 1995. Declining snowmelt nitrate was caused primarily by changes in snow regime induced by the 1987-1992 drought: years with shallow, early melting...
Authors
James O. Sickman, John M. Melack, David W. Clow
Changes in the chemistry of lakes and precipitation in high-elevation national parks in the western United States, 1985–1999 Changes in the chemistry of lakes and precipitation in high-elevation national parks in the western United States, 1985–1999
High-elevation lakes in the western United States are sensitive to atmospheric deposition of sulfur and nitrogen due to fast hydrologic flushing rates, short growing seasons, an abundance of exposed bedrock, and a lack of well-developed soils. This sensitivity is reflected in the dilute chemistry of the lakes, which was documented in the U.S. Environmental Protection Agency's Western...
Authors
David W. Clow, James O. Sickman, Robert G. Striegl, David P. Krabbenhoft, John G. Elliott, Mark M. Dornblaser, David A. Roth, Donald H. Campbell
Rocky Mountain snowpack chemistry network: History, methods, and the importance of monitoring mountain ecosystems Rocky Mountain snowpack chemistry network: History, methods, and the importance of monitoring mountain ecosystems
Because regional-scale atmospheric deposition data in the Rocky Mountains are sparse, a program was designed by the U.S. Geological Survey to more thoroughly determine the quality of precipitation and to identify sources of atmospherically deposited pollution in a network of high-elevation sites. Depth-integrated samples of seasonal snowpacks at 52 sampling sites, in a network from New...
Authors
George P. Ingersoll, John T. Turk, M. Alisa Mast, David W. Clow, Donald H. Campbell, Zelda C. Bailey