Rocky Mountain Snowpack Chemistry at Selected Sites, 2003
Chemical composition of the Rocky Mountain snowpack during water year 2003 was determined from samples collected at 74 sites extending from New Mexico to Montana. Snow samples were collected near the end of the 2003 snowfall season from a snowpack that was below average in every sampled basin but on...
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ftdtic:ADA441943 2023-05-15T16:37:54+02:00 Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 Ingersoll, George P. Mast, M. A. Nanus, Leora Manthorne, David J. Handran, Heather H. Hulstrand, Douglas M. Winterringer, Jesse GEOLOGICAL SURVEY RESTON VA 2005 text/html http://www.dtic.mil/docs/citations/ADA441943 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA441943 en eng http://www.dtic.mil/docs/citations/ADA441943 Approved for public release; distribution is unlimited. This document is not available from DTIC in microfiche. DTIC Snow Ice and Permafrost *CHEMICAL COMPOSITION *SNOW COVER MOUNTAINS MERCURY AMMONIUM COMPOUNDS SULFATES NITRATES ROCKY MOUNTAIN SNOWPACK Text 2005 ftdtic 2016-02-22T01:12:47Z Chemical composition of the Rocky Mountain snowpack during water year 2003 was determined from samples collected at 74 sites extending from New Mexico to Montana. Snow samples were collected near the end of the 2003 snowfall season from a snowpack that was below average in every sampled basin but one, based on March 1 snow-water equivalent data. Significant snowfall during March increased snow-water equivalent values to near-average or greater in some basins, but for most of the basins below-average snowwater equivalent values on April 1 indicated that the regionwide drought continued. Regional patterns in the concentrations of major ions including ammonium, nitrate, sulfate, mercury, and the stable sulfur-34 isotope (delta34S) differed from the previous year, 2002, which was affected by more severe drought conditions. At sites reported during both water years 2002-03, snowpack ammonium concentrations for 2003 were higher than concentrations in 2002 at most sites in the region. Nitrate concentrations were lower in 2003 than in 2002 at nearly all network sites, particularly at sites in Colorado and New Mexico. Sulfate increased across the region at about one-half of the sites reported for both years, whereas mercury concentrations decreased at slightly more than one-half of the sites in 2003. Ratios of delta34S exhibited a similar regional pattern as observed in 2002 with ratios generally increasing northward from New Mexico and southern Colorado to northern Colorado, Wyoming, Idaho, and Montana. The original document contains color images. Prepared in cooperation with the National Park Service and the U.S. Department of Agriculture Forest Service. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *CHEMICAL COMPOSITION *SNOW COVER MOUNTAINS MERCURY AMMONIUM COMPOUNDS SULFATES NITRATES ROCKY MOUNTAIN SNOWPACK |
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Snow Ice and Permafrost *CHEMICAL COMPOSITION *SNOW COVER MOUNTAINS MERCURY AMMONIUM COMPOUNDS SULFATES NITRATES ROCKY MOUNTAIN SNOWPACK Ingersoll, George P. Mast, M. A. Nanus, Leora Manthorne, David J. Handran, Heather H. Hulstrand, Douglas M. Winterringer, Jesse Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
topic_facet |
Snow Ice and Permafrost *CHEMICAL COMPOSITION *SNOW COVER MOUNTAINS MERCURY AMMONIUM COMPOUNDS SULFATES NITRATES ROCKY MOUNTAIN SNOWPACK |
description |
Chemical composition of the Rocky Mountain snowpack during water year 2003 was determined from samples collected at 74 sites extending from New Mexico to Montana. Snow samples were collected near the end of the 2003 snowfall season from a snowpack that was below average in every sampled basin but one, based on March 1 snow-water equivalent data. Significant snowfall during March increased snow-water equivalent values to near-average or greater in some basins, but for most of the basins below-average snowwater equivalent values on April 1 indicated that the regionwide drought continued. Regional patterns in the concentrations of major ions including ammonium, nitrate, sulfate, mercury, and the stable sulfur-34 isotope (delta34S) differed from the previous year, 2002, which was affected by more severe drought conditions. At sites reported during both water years 2002-03, snowpack ammonium concentrations for 2003 were higher than concentrations in 2002 at most sites in the region. Nitrate concentrations were lower in 2003 than in 2002 at nearly all network sites, particularly at sites in Colorado and New Mexico. Sulfate increased across the region at about one-half of the sites reported for both years, whereas mercury concentrations decreased at slightly more than one-half of the sites in 2003. Ratios of delta34S exhibited a similar regional pattern as observed in 2002 with ratios generally increasing northward from New Mexico and southern Colorado to northern Colorado, Wyoming, Idaho, and Montana. The original document contains color images. Prepared in cooperation with the National Park Service and the U.S. Department of Agriculture Forest Service. |
author2 |
GEOLOGICAL SURVEY RESTON VA |
format |
Text |
author |
Ingersoll, George P. Mast, M. A. Nanus, Leora Manthorne, David J. Handran, Heather H. Hulstrand, Douglas M. Winterringer, Jesse |
author_facet |
Ingersoll, George P. Mast, M. A. Nanus, Leora Manthorne, David J. Handran, Heather H. Hulstrand, Douglas M. Winterringer, Jesse |
author_sort |
Ingersoll, George P. |
title |
Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
title_short |
Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
title_full |
Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
title_fullStr |
Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
title_full_unstemmed |
Rocky Mountain Snowpack Chemistry at Selected Sites, 2003 |
title_sort |
rocky mountain snowpack chemistry at selected sites, 2003 |
publishDate |
2005 |
url |
http://www.dtic.mil/docs/citations/ADA441943 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA441943 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA441943 |
op_rights |
Approved for public release; distribution is unlimited. This document is not available from DTIC in microfiche. |
_version_ |
1766028203771559936 |