Melisa A. DiazByron J. AdamsKathleen A. WelchSue WelchAlia KhanDiane M. McKnightW. Berry Lyons 2022-03-03 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/6e55031fc79fa3cc6305ff318522b775 https://mcm.lternet.edu/content/major-ion-and-nutrient-concentrations-water-soluble-salts-leached-aeolian-material-mcmurdo To evaluate the role of Antarctic aeolian transport in surface chemistry homogenization, fifty-three samples of aeolian material from the McMurdo Dry Valleys region of Antarctica were collected and analyzed for water-soluble major ions and nutrients at a 1:5 sediment:water ratio. Samples were collected seasonally from Alatna Valley, Victoria Valley, Miers Valley, and Taylor Valley (Taylor Glacier, East Lake Bonney, F6 (Lake Fryxell), and Explorer’s Cove) at five heights (~5, 10, 20, 50, 100 cm) above the surface between 2013 and 2015. This data package is associated with Aeolian Material Transport and Its Role in Landscape Connectivity in the McMurdo Dry Valleys, Antarctica, published by Diaz et al. in 2018 (DOI: 10.1029/2017JF004589). Funding for this work was provided by the National Science Foundation for Long Term Ecological Research via grants #OPP-1115245 and #OPP-1637708. 2013-01-15 2016-01-14 ground condition As needed Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 36 km from the coast in Alatna Valley. Location details provided by Melisa Diaz in March 2019. 161.111020000000 161.111020000000 -76.900080000000 -76.900080000000 950m 950m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 27 km from the coast near East Lake Bonney in Taylor Valley. Location details provided by Melisa Diaz in March 2019. 162.562330000000 162.562330000000 -77.692630000000 -77.692630000000 64m 64m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 3.5 km from the coast in the Explorer's Cove region of Taylor Valley. Location details provided by Melisa Diaz in March 2019. 163.417520000000 163.417520000000 -77.588730000000 -77.588730000000 24m 24m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 8.5 km from the coast near Lake Fryxell and the F6 camp in Taylor Valley. Location details provided by Melisa Diaz in March 2019. 163.248700000000 163.248700000000 -77.608500000000 -77.608500000000 19m 19m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 10.5 km from the coast in Miers Valley. Location details provided by Melisa Diaz in March 2019. 163.794230000000 163.794230000000 -78.098050000000 -78.098050000000 50m 50m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 38.5 km from the coast on Taylor Glacier in Taylor Valley. Location details provided by Melisa Diaz in March 2019. 162.131350000000 162.131350000000 -77.740020000000 -77.740020000000 334m 334m meter Big Spring Number Eight (BSNE) isokinetic wind aspirated sampler located 47 km from the coast in Victoria Valley. Location details provided by Melisa Diaz in March 2019. 161.600620000000 161.600620000000 -77.330920000000 -77.330920000000 450m 450m meter LTER Core Areas inorganic nutrients None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Stephen O. Opiyo Role: associated researcher Name: S. Craig Cary Role: associated researcher Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Big Spring Number Eight (BSNE) isokinetic wind aspirated samplers were deployed at seven collection sites throughout the McMurdo Dry Valleys. These samplers passively collect 95% of airborne material that enters the collection box opening, regardless of wind velocity or direction. Though the aeolian material collection trays were initially set to standardized heights above the surface (5, 10, 20, 50, and 100 cm), strong winds generated variation in heights among the individual units. Therefore, relative elevation terms (bottom lower, bottom middle, bottom upper, middle, and top) are used in this work rather than absolute heights. Aeolian material from Alatna, Victoria, Taylor (Explorer's Cove, F6, East Lake Bonney, and Taylor Glacier), and Miers Valleys was collected seasonally in 2013 and 2014 and year-round for 2015. Fifty-three samples were obtained, with 38 samples containing more than 5 g. Samples were collected twice: once in November and again in January. November collections are termed “winter” (from 15 January to 31 October), while January collections are termed “summer” (from 1 November to 14 January). With samples with greater than 5 g of mass, 0.5 g of sample was leached with 2.5 ml of 18 Ω deionized (DI) water chilled to 3 °C. Samples with ~5 g of mass were leached using the entire mass of the sample. Sequential leaches of aeolian material were performed at a 1:5 sediment:DI water ratio. For the first leach, samples were agitated for 1 min by hand then set to rest at 3 °C for 30 min. After 30 min, the water from the first leach was extracted and filtered using a 0.45-μm Whatman® polypropylene syringe filter and stored in a clean Falcon™ tube at 3 °C in preparation for chemical analysis. The first two to three drops of leachate were discarded to minimize potential contamination from the filtration process. The second leach followed a similar procedure, but the extraction lasted for 24 hr. These two time steps were chosen to ideally simulate short pulses of water hydrating aeolian sediment in the McMurdo Dry Valleys to dissolve rapidly soluble solids (30 min) and long-term wetting (24 hr).  Soluble reactive phosphorous (PO43-) and nitrate plus nitrite (NO3- + NO2-) analyzed on a Skalar San++ Automated Wet Chemistry Analyzer with an SA 1050 Random Access Auto-sampler. Cations were analyzed using a Dionex DX-120 ion chromatograph (IC) with an AS40 automated sampler and anions were analyzed using a Dionex ICS-2100 ion chromatograph and an AS-DV automated sampler. Big Spring Number Eight (BSNE) isokinetic wind aspirated samplers were deployed at seven collection sites throughout the McMurdo Dry Valleys. These samplers passively collect 95% of airborne material that enters the collection box opening, regardless of wind velocity or direction. Though the aeolian material collection trays were initially set to standardized heights above the surface (5, 10, 20, 50, and 100 cm), strong winds generated variation in heights among the individual units. Therefore, relative elevation terms (bottom lower, bottom middle, bottom upper, middle, and top) are used in this work rather than absolute heights.Aeolian material from Alatna, Victoria, Taylor (Explorer's Cove, F6, East Lake Bonney, and Taylor Glacier), and Miers Valleys was collected seasonally in 2013 and 2014 and year-round for 2015. Fifty-three samples were obtained, with 38 samples containing more than 5 g. Samples were collected twice: once in November and again in January. November collections are termed “winter” (from 15 January to 31 October), while January collections are termed “summer” (from 1 November to 14 January).With samples with greater than 5 g of mass, 0.5 g of sample was leached with 2.5 ml of 18 Ω deionized (DI) water chilled to 3 °C. Samples with ~5 g of mass were leached using the entire mass of the sample. Sequential leaches of aeolian material were performed at a 1:5 sediment:DI water ratio. For the first leach, samples were agitated for 1 min by hand then set to rest at 3 °C for 30 min. After 30 min, the water from the first leach was extracted and filtered using a 0.45-μm Whatman® polypropylene syringe filter and stored in a clean Falcon™ tube at 3 °C in preparation for chemical analysis. The first two to three drops of leachate were discarded to minimize potential contamination from the filtration process. The second leach followed a similar procedure, but the extraction lasted for 24 hr. These two time steps were chosen to ideally simulate short pulses of water hydrating aeolian sediment in the McMurdo Dry Valleys to dissolve rapidly soluble solids (30 min) and long-term wetting (24 hr). Soluble reactive phosphorous (PO43-) and nitrate plus nitrite (NO3- + NO2-) analyzed on a Skalar San++ Automated Wet Chemistry Analyzer with an SA 1050 Random Access Auto-sampler. Cations were analyzed using a Dionex DX-120 ion chromatograph (IC) with an AS40 automated sampler and anions were analyzed using a Dionex ICS-2100 ion chromatograph and an AS-DV automated sampler. unknown AEOLIAN_CHEM Dataset Code Internal dataset code. The data provider Internal dataset code. Site Location where sample was collected. The data provider Location where sample was collected. Relative sample height Height above the ground where sample was collected. Relative terms (bottom lower, bottom middle, bottom upper, middle, top) loosely correspond with ~ 5, 10, 20, 50, 100 cm above the surface. The data provider Height above the ground where sample was collected. Relative terms (bottom lower, bottom middle, bottom upper, middle, top) loosely correspond with ~ 5, 10, 20, 50, 100 cm above the surface. Sample height Approximate sample height. The aeolian material collection trays were initially set to standardized heights above the surface (5, 10, 20, 50, and 100 cm). However, strong winds generated variation in heights among the individual units. Relative terms (bottom lower, bottom middle, bottom upper, middle, top) loosely correspond with ~ 5, 10, 20, 50, 100 cm above the surface. The data provider centimeter Timeframe Timeframe when sample was collected. November collections are termed “winter” (from 15 January to 31 October), while January collections are termed “summer” (from 1 November to 14 January). The data provider Timeframe when sample was collected. November collections are termed “winter” (from 15 January to 31 October), while January collections are termed “summer” (from 1 November to 14 January). Leach time The amount of time during which the sample was leached (30 min or 24 hour). Total represents the sum of the first (30 min) and second (24 hour) leach. The data provider The amount of time during which the sample was leached (30 min or 24 hour). Total represents the sum of the first (30 min) and second (24 hour) leach. Fluoride Fluoride (F-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Chloride Chloride (Cl-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Bromide Bromide (Br-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Sulfate Sulfate (SO42-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Sodium Sodium (Na+) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Potassium Potassium (K+) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Magnesium Magnesium (Mg2+) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Calcium Calcium (Ca2+) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Nitrate Nitrate (NO3- + NO2-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram Soluble reactive phosphorus Soluble reactive phosphorus (SO43-) concentration in the sample. Empty cells represent concentration levels below the instrument detection limit. The data provider micromolePerGram 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-diaz-aeolian-chem-20220303.csv None 2022-03-03 2022-03-03 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