Anna J. BergstromKathleen A. WelchW. Berry LyonsMichael N. Gooseff 2022-10-12 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/9686975eea022c6af30abf2ce23ddbed https://mcm.lternet.edu/content/snowpit-chemistry-canada-commonwealth-and-rhone-glaciers-mcmurdo-dry-valleys-antarctica To examine temporal and spatial variability in snow chemistry during the 2000-2001 austral summer, snow samples were collected from the accumulation zones of Canada, Commonwealth, and Rhone Glaciers, located in Taylor Valley in the McMurdo Dry Valleys region of Antarctica. Snowpits were excavated to a depth of 2 meters at each location and samples were collected using a depth interval of 3 cm utilizing clean sampling techniques. Snow density was measured in the field at the time of sample collection. Samples were analyzed for major ions in the Crary Lab at McMurdo Station.  This work was funded by several grants from the U.S. National Science Foundation for Long Term Ecological Research, most recently under award #OPP-1637708. 2000-12-01 2001-01-20 ground condition As needed Snowpit was excavated in the accumulation zone of the Canada Glacier during the 2000-2001 austral summer. GPS coordinates were not obtained at the time of sample collection. Location is approximated based on the recollection of Thomas Nylen, and provided by Kathy Welch in October 2022. 162.736642000000 162.736642000000 -77.585997000000 -77.585997000000 Snowpit was excavated in the accumulation zone of the Commonwealth Glacier during the 2000-2001 austral summer. GPS coordinates were not obtained at the time of sample collection. Location is approximated based on the recollection of Thomas Nylen, and provided by Kathy Welch in October 2022.  163.042805000000 163.042805000000 -77.544556310000 -77.544556310000 Snowpit was excavated in the accumulation zone of the Rhone Glacier during the 2000-2001 austral summer. GPS coordinates were not obtained at the time of sample collection. Location is approximated based on the recollection of Thomas Nylen, and provided by Kathy Welch in October 2022. 161.968797000000 161.968797000000 -77.642947000000 -77.642947000000 LTER Core Areas inorganic nutrients None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Thomas Nylen Role: field crew Name: Whitney Gann Role: field crew Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Samples were collected from 2 meter snowpits in the accumulation zone of Canada, Commonwealth, and Rhone Glaciers in Taylor Valley, located in the McMurdo Dry Valleys region of Antarctica.Snowpits were excavated to a depth of 2 meters at each location and samples were collected using a depth interval of approximately 3 cm utilizing clean sampling techniques. After excavation, the vertical surface was scraped in intervals to reveal a freshly exposed surface. Researchers wore non-particulating suits, clean polyethylene gloves, and used a plexiglass tray to collect the snow from a horizontal layer. Snow samples were transferred to wide-mouth Nalgene polycarbonate jars.Before analysis, the samples were melted and transferred to 60 ml plastic bottles that had been cleaned with ultrapure water. The melted snow samples were stored at ~4 &deg;C until analysis in the Crary Lab at McMurdo Station using methods outlined in Welch et al. 2010 (doi: 10.1017/S0954102010000702). In order to improve the detection limit for these low concentration samples, a 350 &micro;l sample loop was used to inject a larger sample volume onto the chromatography columns. The samples were analyzed between 01/21/2001 and 02/11/2001.Snow density was also measured in the field using a snow density kit obtained from the Berg Field Center, McMurdo Station, Antarctica.Timeframe and geographic coordinates of sample collections were approximated based on the recollections of Kathy Welch and Thomas Nylen. Samples were collected from 2 meter snowpits in the accumulation zone of Canada, Commonwealth, and Rhone Glaciers in Taylor Valley, located in the McMurdo Dry Valleys region of Antarctica.Snowpits were excavated to a depth of 2 meters at each location and samples were collected using a depth interval of approximately 3 cm utilizing clean sampling techniques. After excavation, the vertical surface was scraped in intervals to reveal a freshly exposed surface. Researchers wore non-particulating suits, clean polyethylene gloves, and used a plexiglass tray to collect the snow from a horizontal layer. Snow samples were transferred to wide-mouth Nalgene polycarbonate jars.Before analysis, the samples were melted and transferred to 60 ml plastic bottles that had been cleaned with ultrapure water. The melted snow samples were stored at ~4 °C until analysis in the Crary Lab at McMurdo Station using methods outlined in Welch et al. 2010 (doi: 10.1017/S0954102010000702). In order to improve the detection limit for these low concentration samples, a 350 µl sample loop was used to inject a larger sample volume onto the chromatography columns. The samples were analyzed between 01/21/2001 and 02/11/2001.Snow density was also measured in the field using a snow density kit obtained from the Berg Field Center, McMurdo Station, Antarctica.Timeframe and geographic coordinates of sample collections were approximated based on the recollections of Kathy Welch and Thomas Nylen. unknown GLAC_CHEM_SNOWPIT Glacier snowpit chemistry data. Dataset code Internal dataset code. The data provider Internal dataset code. Glacier Name of the glacier where the sample was collected. The data provider Name of the glacier where the sample was collected. Sample Name Field sample identifier, which is the abbreviated glacier name and sample top depth. The data provider Field sample identifier, which is the abbreviated glacier name and sample top depth. Sample Depth Top depth of sample layer measured from snowpit surface. The data provider centimeter Chloride concentration Chloride concentration measured in milligrams per liter. The data provider milligramsPerLiter Nitrate concentration Nitrate concentration measured as milligrams per liter of N. The data provider milligramsPerLiter Sulfate concentration Sulfate concentration measured as milligrams per liter of SO4. The data provider milligramsPerLiter Sodium concentration Sodium concentration measured as milligrams per liter. The data provider milligramsPerLiter Potassium concentration Potassium concentration measured as milligrams per liter. The data provider milligramsPerLiter Magnesium concentration Magnesium concentration measured as milligrams per liter. The data provider milligramsPerLiter Calcium concentration Calcium concentration measured as milligrams per liter. The data provider milligramsPerLiter Comments Comments about the sample or analysis, if any. The data provider Comments about the sample or analysis, if any. Snow Density Sample Depth Depth range of snow layer sampled for density based on visual characteristics. The data provider Depth range of snow layer sampled for density based on visual characteristics. Snow Density Snow density measured as grams per cubic centimeter. The data provider gramsPerCentimeterCubed McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-snowpit-20221012_0.csv None 2022-10-12 2022-10-12 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module