uid=MCM,o=EDI,dc=edirepository,dc=org all public read glac_chem_snowpit Anna Bergstrom annabergstrom@boisestate.edu https://orcid.org/0000-0002-9684-4018 Kathleen Welch kathleen.welch@colorado.edu https://orcid.org/0000-0003-1028-3086 W. Berry Lyons

275 Mendenhall Lab Columbus OH 43210 US

(614) 688-3241 lyons.142@osu.edu http://research.bpcrc.osu.edu/EnvironmentalGeochemistry/ https://orcid.org/0000-0002-3143-7251 Michael Gooseff michael.gooseff@colorado.edu http://goosefflab.weebly.com https://orcid.org/0000-0003-4322-8315 McMurdo Dry Valleys LTER http://mcmlter.org/ Thomas Nylen thomasnylen@gmail.com https://orcid.org/0000-0001-9579-8702 field crew Whitney Gann field crew Renée Brown rfbrown@unm.edu https://orcid.org/0000-0002-4986-7663 data manager 2022-10-12 English

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. 

anions calcium cations chemistry chloride ions magnesium nitrate potassium snow sodium sulfate water chemistry LTER Controlled Vocabulary anions Antarctica cations chemistry glacier ions LTER major anions major cations McMurdo Dry Valleys nitrate snow snow density Taylor Valley Station Keywords inorganic nutrients LTER Core Areas 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.

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https://mcm.lternet.edu/content/snowpit-chemistry-canada-commonwealth-and-rhone-glaciers-mcmurdo-dry-valleys-antarctica 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 2000-12-01 2001-01-20 McMurdo Dry Valleys LTER Information Manager im@mcmlter.org McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER

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.

GLAC_CHEM_SNOWPIT Glacier snowpit chemistry data. mcmlter-glac-bergstrom-chem-snowpit-20221012.csv 17392 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-glac-bergstrom-chem-snowpit-20221012_0.csv dataset_code Dataset code Internal dataset code. string Internal dataset code. glacier Glacier Name of the glacier where the sample was collected. string Name of the glacier where the sample was collected. sample_name Sample Name Field sample identifier, which is the abbreviated glacier name and sample top depth. string Field sample identifier, which is the abbreviated glacier name and sample top depth. sample_depth_cm Sample Depth Top depth of sample layer measured from snowpit surface. centimeter real cl_mg_l Chloride concentration Chloride concentration measured in milligrams per liter. milligramsPerLiter real no3n_mg_l Nitrate concentration Nitrate concentration measured as milligrams per liter of N. milligramsPerLiter real so4_mg_l Sulfate concentration Sulfate concentration measured as milligrams per liter of SO4. milligramsPerLiter real na_mg_l Sodium concentration Sodium concentration measured as milligrams per liter. milligramsPerLiter real k_mg_l Potassium concentration Potassium concentration measured as milligrams per liter. milligramsPerLiter real mg_mg_l Magnesium concentration Magnesium concentration measured as milligrams per liter. milligramsPerLiter real ca_mg_l Calcium concentration Calcium concentration measured as milligrams per liter. milligramsPerLiter real comments Comments Comments about the sample or analysis, if any. string Comments about the sample or analysis, if any. snowdensity_depth_cm Snow Density Sample Depth Depth range of snow layer sampled for density based on visual characteristics. string Depth range of snow layer sampled for density based on visual characteristics. snowdensity_g_cm3 Snow Density Snow density measured as grams per cubic centimeter. gramsPerCentimeterCubed real