Anna J. BergstromMichael N. Gooseff 2021-05-06 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/5e285dcbc8dfdf6816805c620510de05 https://mcm.lternet.edu/content/chemical-characteristics-terminal-waterfalls-along-canada-and-suess-glaciers-mcmurdo-dry This data package contains chemical and other relevant characteristics for several waterfalls situated along the terminus of two glaciers in Taylor Valley, located in the McMurdo Dry Valleys region of Antarctica, during the 2017-18 and 2018-19 austral summers. Specifically, water samples were collected from terminal waterfalls along Canada and Seuss Glaciers as part of a larger study characterizing the geochemical evolution of glacier ice to meltwater. Samples were collected from just above the base of each waterfall and processed using similar protocols developed and used by the McMurdo Dry Valleys Long Term Ecological Research program. Funding for these data was provided by the National Science Foundation Grant #OPP-1637708 for Long Term Ecological Research. 2018-01-06 2019-01-06 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 The Suess Glacier is between the Canada Glacier and Lacroix Glacier, flowing south into Taylor Valley. Scott named after the early nineties British Antarctic Expedition for Professor Eduard Suess. 162.744598388672 162.647781372070 -77.633750915527 -77.651824951172 1 000m 1 000m meter 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: Joel G. Singley Role: field crew Name: Michael Finnegan Role: field crew Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Samples were collected in triple DI-washed 500 ml polyethylene bottles from 14 sites distributed around the terminus of the Canada Glacier and 4 sites located on the east side of the Seuss Glacier terminus. Water was collected from the ground, catching waterfall flow mid-air before reaching the proglacial stream. Samples were brought back to the field camp where water was distributed into a 20 ml glass scintillation vial, two triple DI-washed 60 ml polyethylene bottles, and a 20 ml plastic scintillation vial. Both scintillation vials were stored at 4º C and the two 60 ml bottles were frozen at -20º C. An additional 120 ml was poured into a clean glass beaker to measure pH and electrical conductivity. One of the 60 ml bottles was thawed at 4º C in the Crary Lab and analyzed by ion chromatography for Cl-, Ca2+, Na+, K+, Mg2+, and SO4-. The second 60 ml bottle was shipped back to Boulder, Colorado where it was thawed at 4º C and analyzed by Latchet for N (as NO3- + NO2-) and using a colorimetric method for Si in the Arikaree Lab. The remaining sample was brought to the Crary Lab at McMurdo Station and filtered using a pre-weighed GF/F filter to capture sediment. Bottles were thoroughly rinsed to ensure all sediment was captured on the filter. Filters were then dried and weighed to determine sediment mass. All sample water was accounted for in calculating the sediment concentration of each sample. 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 waterfall were calculated using a MD-Infinity flow routing algorithm on a sink-filled 1 m lidar-derived DEM. Samples were collected in triple DI-washed 500 ml polyethylene bottles from 14 sites distributed around the terminus of the Canada Glacier and 4 sites located on the east side of the Seuss Glacier terminus. Water was collected from the ground, catching waterfall flow mid-air before reaching the proglacial stream. Samples were brought back to the field camp where water was distributed into a 20 ml glass scintillation vial, two triple DI-washed 60 ml polyethylene bottles, and a 20 ml plastic scintillation vial. Both scintillation vials were stored at 4º C and the two 60 ml bottles were frozen at -20º C. An additional 120 ml was poured into a clean glass beaker to measure pH and electrical conductivity. One of the 60 ml bottles was thawed at 4º C in the Crary Lab and analyzed by ion chromatography for Cl-, Ca2+, Na+, K+, Mg2+, and SO4-. The second 60 ml bottle was shipped back to Boulder, Colorado where it was thawed at 4º C and analyzed by Latchet for N (as NO3- + NO2-) and using a colorimetric method for Si in the Arikaree Lab. The remaining sample was brought to the Crary Lab at McMurdo Station and filtered using a pre-weighed GF/F filter to capture sediment. Bottles were thoroughly rinsed to ensure all sediment was captured on the filter. Filters were then dried and weighed to determine sediment mass. All sample water was accounted for in calculating the sediment concentration of each sample. Samples were analyzed for water isotopes using cavity ring-down spectroscopy on a Picarro in the Barnard Lab at the University of Colorado BoulderContributing areas to each waterfall were calculated using a MD-Infinity flow routing algorithm on a sink-filled 1 m lidar-derived DEM. unknown GLAC_CHEM_WF 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. Date and time Date and time of sample collection (GMT +13). The data provider calendar date/time MM/DD/YY HH:MM 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 Waterfall ID Identifier of the sample location, where CAN is for Canada Glacier, SUS is for Suess Glacier and the trailing number is the id of the waterfall of each glacier. The data provider Identifier of the sample location, where CAN is for Canada Glacier, SUS is for Suess Glacier and the trailing number is the id of the waterfall of each glacier. Contributing area Area of glacier contributing to the waterfall. The data provider squareMeter Specific conductance Specific conductance of the sample. The data provider microseimensPerSquareCentimeter pH pH of the sample. The data provider pH of the sample. Sediment concentration Concentration of sediment in the sample. The data provider milligramsPerLiter 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 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 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 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 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 Silica concentration Silica 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 (NO2 + NO3). Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. The data provider Nitrate concentration (as N) in the sample (NO2 + NO3). Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. delta 18O delta 18O signature. The data provider permil delta 18O accuracy Accuracy of the 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 the 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-wf-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