Anna J. BergstromMichael N. Gooseff 2021-05-06 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/ea75e039fb7b6314e1c555c9ff8a5009 https://mcm.lternet.edu/content/chemical-characteristics-supraglacial-stream-water-canada-glacier-mcmurdo-dry-valleys This data package contains chemical characteristics of water samples collected along four supraglacial streams on Canada Glacier, located in Taylor Valley, McMurdo Dry Valleys, Antarctica. Samples were collected during the 2015-16 and 2016-17 austral summers in order to characterize the spatial and temporal evolution of glacial meltwater as it travels over and off Canada Glacier. Samples from the 2015-16 austral summer have been fully analyzed and those data are included here. Samples from the 2016-17 austral summer have been stored frozen since collection and have not been analyzed. This package may be amended in the future if analysis of the 2016-17 samples occurs. Funding for these data was provided by the National Science Foundation Grant #OPP-1637708 for Long Term Ecological Research. 2015-12-05 2016-01-11 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: Forrest G. McCarthy Role: field crew Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods This package contains data from 40 sampling sites, with 10 sites each on four streams on Canada Glacier. Stream 1 drains the southwest part of the glacier, stream 2 drains the southeast corner, stream 3 drains the northwest side of the ablation zone, and stream 4 drains the northeast side of the ablation zone.  Samples were collected in triple DI-washed 500 ml polyethylene bottles. In some cases, an ice lid had to be chopped away with an ice axe to access liquid water. In cases where the stream was too narrow or shallow to fill the bottle, the bottle was filled using water scooped with the bottle cap. These conditions are indicated in the notes. After collection, samples were brought back to the field camp where water was distributed into a 20 ml glass scintillation vial, one triple DI-washed and one acid-washed 60 ml polyethylene bottle, and one acid-washed 125 ml bottle. The scintillation vial was stored at 4º C, all polyethylene bottles were frozen at -20º C, and all samples were shipped back to Boulder, Colorado for further analyses. One 60 ml bottle was thawed at 4º C in the Crary lab at McMurdo Station and analyzed by ion chromatography for Cl-, SO4-, and NO3-. Atomic absorption spectroscopy was used to analyze samples for Ca2+, Na+, K+, Mg2+, and by Latchet for NH4+ in the Arikaree Lab at the University of Colorado Boulder. Samples were analyzed for water isotopes using cavity ring-down spectroscopy on a Picarro in the Barnard Lab at the University of Colorado Boulder. Contributing areas to each sampling point were calculated using a MD-Infinity flow routing algorithm on a sink-filled 1 m lidar-derived DEM. This package contains data from 40 sampling sites, with 10 sites each on four streams on Canada Glacier. Stream 1 drains the southwest part of the glacier, stream 2 drains the southeast corner, stream 3 drains the northwest side of the ablation zone, and stream 4 drains the northeast side of the ablation zone. Samples were collected in triple DI-washed 500 ml polyethylene bottles. In some cases, an ice lid had to be chopped away with an ice axe to access liquid water. In cases where the stream was too narrow or shallow to fill the bottle, the bottle was filled using water scooped with the bottle cap. These conditions are indicated in the notes. After collection, samples were brought back to the field camp where water was distributed into a 20 ml glass scintillation vial, one triple DI-washed and one acid-washed 60 ml polyethylene bottle, and one acid-washed 125 ml bottle. The scintillation vial was stored at 4º C, all polyethylene bottles were frozen at -20º C, and all samples were shipped back to Boulder, Colorado for further analyses. One 60 ml bottle was thawed at 4º C in the Crary lab at McMurdo Station and analyzed by ion chromatography for Cl-, SO4-, and NO3-. Atomic absorption spectroscopy was used to analyze samples for Ca2+, Na+, K+, Mg2+, and by Latchet for NH4+ in the Arikaree Lab at the University of Colorado Boulder. Samples were analyzed for water isotopes using cavity ring-down spectroscopy on a Picarro in the Barnard Lab at the University of Colorado Boulder.Contributing areas to each sampling point were calculated using a MD-Infinity flow routing algorithm on a sink-filled 1 m lidar-derived DEM. unknown GLAC_CHEM_SUPRA 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 site ID Identifier of the sampling location. S# refers to the specific stream (1, 2, 3, or 4) and the number after the dash refers to the site on the specific stream (1-10) where 1 is the downstream most site closest to the edge of the glacier. The data provider Identifier of the sampling location. S# refers to the specific stream (1, 2, 3, or 4) and the number after the dash refers to the site on the specific stream (1-10) where 1 is the downstream most site closest to the edge of the glacier. 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 Contributing area Contributing area of the glacier that is contributing to the waterfall. The data provider squareMeter Distance Stream distance from the most downstream sampling point. The data provider meter Date and time Date and time of sample collection (GMT +13). The data provider calendar date/time MM/DD/YY HH:MM gregorian calendar Chloride concentration Chloride 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 Nitrate concentration Nitrate concentration (as N) 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 sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter Ammonium concentration Ammonium concentration (as N) in the 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 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 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 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 sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider milligramsPerLiter delta 18O Delta 18O signature. The data provider permil delta 18O accuracy Accuracy of delta 18O value, estimated as average accuracy over a run of 40 samples. The data provider permil delta Deuterium Delta deuterium signature. The data provider permil delta Deuterium accuracy Accuracy of delta Deuterium value, estimated as average accuracy over a run of 40 samples. The data provider permil Deuterium excess Deuterium excess The data provider permil Comments Comments related to sample collection or analysis. The data provider Comments related to sample collection or analysis. 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-supra-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