GLAC_CHEM_WF English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2021-05-06 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Chemical characteristics of terminal waterfalls along the Canada and Suess Glaciers in the McMurdo Dry Valleys, Antarctica in January of 2018 and 2019 2021-05-06 publication Anna Bergstrom Boise State University https://www.boisestate.edu/ annabergstrom@boisestate.edu pointOfContact Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com pointOfContact documentDigital 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. 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 completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact inorganic nutrients theme LTER Core Areas English 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 -77.632133483887 -77.598403930664 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 -77.651824951172 -77.633750915527 ground condition 2018-01-06 2019-01-06 Funding for these data was provided by the National Science Foundation Grant #OPP-1637708 for Long Term Ecological Research. https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-wf-20210601.csv GLAC_CHEM_WF eng; US McMurdo Dry Valleys LTER GLAC_CHEM_WF Number of Header Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false DATASET_CODE Internal dataset code. GLACIER Name of the glacier where the sample was collected. DATE_TIME Date and time of sample collection (GMT +13). Date Time Format: MM/DD/YY HH:MM LATITUDE Latitude of sample collection (GCS WGS1984) in decimal degrees. LONGITUDE Longitude of sample collection (GCS WGS1984) in decimal degrees. 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. CONTRIBUTING_AREA_M2 Area of glacier contributing to the waterfall. SC Specific conductance of the sample. PH pH of the sample. SED_CONC_MG_L Concentration of sediment in the sample. CL_MG_L Chloride concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. CA_MG_L Calcium concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. NA_MG_L Sodium concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. K_MG_L Potassium concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. MG_MG_L Magnesium concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. SO4_MG_L Sulfate concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. SI_MG_L Silica concentration in the sample. Value of -100 is below detection limit, while -9999 indicates an unanalyzed sample and/or missing value. N_NO3_MG_L 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. D18O delta 18O signature. D18O_ACCURACY Accuracy of the delta 18O value, estimated as average accuracy over a run of 40 samples. DD delta Deuterium signature. DD_ACCURACY Accuracy of the delta Deuterium value, estimated as average accuracy over a run of 40 samples. D_EXCESS Deuterium excess. COMMENTS Comments related to sample collection or analysis. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-wf-20210601.csv dataset 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact