Anna J. BergstromMichael N. Gooseff 2021-05-06 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/1aea37d5e5a449c7523684587f758b6c https://mcm.lternet.edu/content/chemical-characteristics-snow-ablation-zone-canada-glacier-mcmurdo-dry-valleys-antarctica This data package contains chemical characteristics of snow in the ablation zone of Canada Glacier, located in Taylor Valley, McMurdo Dry Valleys, Antarctica during the 2016-17 austral summer. Specifically, snow samples were collected from the ablation zones of Canada and Commonwealth Glaciers to characterize the chemistry of recent snowfall in the ablation zones of these glaciers. Samples were collected in triplicate near mass balance stakes on the same date ice cores were collected as part of a larger study characterizing the spatial and temporal geochemical evolution of glacial meltwater. A subset of snow samples collected from Canada Glacier have been analyzed and are included here. This package may be amended in the future if analysis of the remaining samples from both Canada and Commonwealth Glaciers occurs. Funding for these data was provided by the National Science Foundation Grant #OPP-1637708 for Long Term Ecological Research. 2016-11-28 ground condition As needed The Canada Glacier a small glacier flowing south-east into the northern side of Taylor Valley.  The glacier receives less than 10 cm of snowfall annually. Its seasonal melting feeds Lake Hoare to the west and Lake Fryxell to the east. 163.057708740234 162.894287109375 -77.598403930664 -77.632133483887 LTER Core Areas inorganic nutrients None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Kathleen A. Welch Role: lab technician Name: Marci J. Beitch Role: field crew Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Snow collection occurred at five locations (2 on Canada Glacier and 3 on Commonwealth Glacier) co-located with ice cores and seasonal mass balance measurement locations (ablation stakes). However, this package only includes data from the subset of samples that have been analyzed. Snow samples were collected within several meters of ice core collections (these data are in an accompanying data package) and mass balance stakes. Samples were collected using a clean scoop and gloved hands and placed in a clean whirlpack. Upon collection, samples were placed in a cooler that was transported back to a field camp and stored at -20º C. Samples were later transported to the Crary Lab at McMurdo Station where they were melted and poured into a triple DI-washed polyethylene bottle and refrozen. Samples were then shipped back to Boulder, Colorado and stored at -20º C.The samples collected from Canada Glacier on 28 November 2016 were thawed at 4º C and analyzed by atomic absorption spectroscopy for Ca2+, Mg2+, K+, and Na+, and by ion chromatography (IC) for Cl-, NO3-, and SO4-.While the remaining samples have not yet been processed, additional notes regarding sample collection are provided here for reference. 28 November 2016, Canada Glacier: Snow was collected from snowfall that began on 21 November 2016. Total accumulation was approximately 6 inches. Some snow melt was observed on the glacier at the time of sampling, particularly in more sloped locations. Samples were collected integrating the entire depth of snow, approximately 3 inches. 6 December 2016, Canada Glacier: Additional snow samples were collected at the #52 and #54 ablation stakes (same as on 28 November 2016). Snow was crusty and had been redistributed as a result of a Foehn wind event that had occurred on 1 December 2016. More sediment was visible in the snow. 12 December 2016, Canada Glacier: Snow was collected from the #52 and #54 ablation stakes in depressions that had collected/maintained wind-blown snow. 13 December 2016, Commonwealth Glacier: Snow was collected from the #5, #6 and #10 ablation stakes. There was approximately 2 inches of snow on top of ice at the time of collection. Snow collection occurred at five locations (2 on Canada Glacier and 3 on Commonwealth Glacier) co-located with ice cores and seasonal mass balance measurement locations (ablation stakes). However, this package only includes data from the subset of samples that have been analyzed. Snow samples were collected within several meters of ice core collections (these data are in an accompanying data package) and mass balance stakes. Samples were collected using a clean scoop and gloved hands and placed in a clean whirlpack. Upon collection, samples were placed in a cooler that was transported back to a field camp and stored at -20º C. Samples were later transported to the Crary Lab at McMurdo Station where they were melted and poured into a triple DI-washed polyethylene bottle and refrozen. Samples were then shipped back to Boulder, Colorado and stored at -20º C.The samples collected from Canada Glacier on 28 November 2016 were thawed at 4º C and analyzed by atomic absorption spectroscopy for Ca2+, Mg2+, K+, and Na+, and by ion chromatography (IC) for Cl-, NO3-, and SO4-.While the remaining samples have not yet been processed, additional notes regarding sample collection are provided here for reference.28 November 2016, Canada Glacier: Snow was collected from snowfall that began on 21 November 2016. Total accumulation was approximately 6 inches. Some snow melt was observed on the glacier at the time of sampling, particularly in more sloped locations. Samples were collected integrating the entire depth of snow, approximately 3 inches.6 December 2016, Canada Glacier: Additional snow samples were collected at the #52 and #54 ablation stakes (same as on 28 November 2016). Snow was crusty and had been redistributed as a result of a Foehn wind event that had occurred on 1 December 2016. More sediment was visible in the snow.12 December 2016, Canada Glacier: Snow was collected from the #52 and #54 ablation stakes in depressions that had collected/maintained wind-blown snow.13 December 2016, Commonwealth Glacier: Snow was collected from the #5, #6 and #10 ablation stakes. There was approximately 2 inches of snow on top of ice at the time of collection. unknown GLAC_CHEM_SNOW Dataset code Internal dataset code. The data provider Internal dataset code. Glacier Name of the glacier where the snow sample was collected. The data provider Name of the glacier where the snow sample was collected. Sample date Date of sample collection (GMT +13). The data provider calendar date/time MM/DD/YY gregorian calendar Latitude Latitude of sample collection (GCS WGS1984) in decimal degrees. The data provider decimalDegrees Longitude Longitude of sample collection (GCS WGS1984) in decimal degrees. The data provider decimalDegrees Stake ID Ablation stake number adjacent to sample collection location. The data provider Ablation stake number adjacent to sample collection location. Replicate Letter identifying snow sample replicate at each sampling location. The data provider Letter identifying snow sample replicate at each sampling location. Chloride concentration Chloride concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Nitrogen (as nitrate) concentration Nitrogen (N-NO3) concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Sulfate concentration Sulfate concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Calcium concentration Calcium concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Magnesium concentration Magnesium concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Potassium concentration Potassium concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Sodium concentration Sodium concentration in the snow sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter 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-snow-20210601.csv None 2021-05-06 2021-05-06 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