glac_chem_snowpit English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2022-10-12 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Snowpit chemistry from Canada, Commonwealth, and Rhone Glaciers, McMurdo Dry Valleys, Antarctica during the 2000-2001 austral summer 2022-10-12 publication Anna Bergstrom Boise State University https://www.boisestate.edu/ annabergstrom@boisestate.edu pointOfContact Kathleen Welch University of Colorado Boulder http://www.colorado.edu/ kathleen.welch@colorado.edu pointOfContact W. Berry Lyons The Ohio State University https://www.osu.edu/ (614) 688-3241 275 Mendenhall Lab Columbus OH 43210 US lyons.142@osu.edu http://research.bpcrc.osu.edu/EnvironmentalGeochemistry/ pointOfContact Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com pointOfContact documentDigital 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.  Name: Thomas Nylen Role: field crew Name: Whitney Gann Role: field crew Name: Renée F. Brown Role: data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact inorganic nutrients theme LTER Core Areas English 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 ground condition 2000-12-01 2001-01-20 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. https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-snowpit-20221012_0.csv GLAC_CHEM_SNOWPIT eng; US McMurdo Dry Valleys LTER GLAC_CHEM_SNOWPIT Data Source Definition : Glacier snowpit chemistry data. Number of Header Lines : 1 Orientation : Column Field Delimiter : , false dataset_code Internal dataset code. glacier Name of the glacier where the sample was collected. sample_name Field sample identifier, which is the abbreviated glacier name and sample top depth. sample_depth_cm Top depth of sample layer measured from snowpit surface. cl_mg_l Chloride concentration measured in milligrams per liter. no3n_mg_l Nitrate concentration measured as milligrams per liter of N. so4_mg_l Sulfate concentration measured as milligrams per liter of SO4. na_mg_l Sodium concentration measured as milligrams per liter. k_mg_l Potassium concentration measured as milligrams per liter. mg_mg_l Magnesium concentration measured as milligrams per liter. ca_mg_l Calcium concentration measured as milligrams per liter. comments Comments about the sample or analysis, if any. snowdensity_depth_cm Depth range of snow layer sampled for density based on visual characteristics. snowdensity_g_cm3 Snow density measured as grams per cubic centimeter. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-snowpit-20221012_0.csv dataset 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact