Diana H. WallRoss A. Virginia 2014-11-11 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/7eeb0aab3998b75e4e626cab2bcb60ba https://mcm.lternet.edu/content/habitat-suitability-soil-moisture Investigation of the variation in soil biota and soil properties across the McMurdo Dry Valleys as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The moisture content of soil samples which are collected for organism extraction and identification is determined. This study was carried out in the austral summer 1993/1994 1993-01-01 1993-12-31 ground condition This file was created by Mark St. John on 15 Oct 1998, using raw data from the Excel workbook '9394EGso.RAW'. The file format was suggested by the LTER data manager, to conform with the relational database structure. [AnP 19 Sept 1997]. The file name was changed to 9394bdso.dat on 17 Oct 01 by Nicole DeCrappeo. (ND17 Oct 01) As needed The Cape Royds Pond 1 is an ice free pond in the Ross IslandCode : CR1Area: 1,792 Temperature: 6.3 celsius  166.163772583008 166.163772583008 -77.552818298340 -77.552818298340 The Labyrinth Pond 4 is located in the Wright Valley. Ice-covered, heavily shaded, lense-shaped.Code: LAB4Area: 25,805Temperature: 2.6 celsius  161.063613891602 161.063613891602 -77.560478210449 -77.560478210449 Lake Bonney occupies a glacially scoured bedrock basin in Taylor Valley. It is located at the head of the valley and is perennially ice-covered. The lake has two basins (lobes) connected by a narrow, shallow channel. There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). The lake is bordered to the north by the Asgard Range and to the south by the Kukri Hills. Mountain and cirque glaciers occupy hanging valleys between these peaks and supply meltwater intermittently to the lake during warmer periods in summer. The largest source of meltwater, however, is from the Taylor Glacier, which extends from the polar ice-cap and terminates in the western end of the west lobe of Lake Bonney. Valley: Taylor Distance to Sea : 25 Maximum Length (km): 7 Maximum Width (km): 0.9 Maximum Depth (m): 40 Surface Area (km^2): 4.3 Ice Thickness Average Surface (m): 2.8 - 4.5 Volume (m^3 * 10^6): 64.8 162.371994018555 162.371994018555 -77.719100952148 -77.719100952148 57m 57m meter Lake Brownworth is a meltwater lake west of Wright Lower Glacier at the east end of Wright Valley. It was named by the Advisory Committee on Antarctic Names for Frederick S. Brownworth Jr., 162.823226928711 162.718856811523 -77.417655944824 -77.442016601563 5m 5m meter Lake Vanda is located in the Wright Valley, adjacent to the Taylor Valley. It is fed primarily by the Onyx River, which has its origin at Lake Brownworth, and ultimately at the Lower Wright Glacier located ~27 km east of the lake. The lake has no outflow. Valley: Wright Distance to Sea : 47 Maximum Length (km): 8 Maximum Width (km): 2 Maximum Depth (m): 75 Surface Area (km^2): 5.2 Ice Thickness Average Surface (m): 2.8 - 4.2 Volume (m^3 * 10^6): 160 161.691970825195 161.391906738281 -77.518882751465 -77.542304992676 143m 143m meter The Lake Fryxell basin is formed by a moraine depression in a wider portion of the Taylor Valley. It has a number of moraine islands and shallower areas, as well as several relatively well developed deltas. The lake is fed by at least 10 meltwater streams with a total drainage catchment of 230 km2. The lake is dammed to the southwest by the Canada Glacier and is topographically closed. It is perennially ice covered; during summer months, an ice-free moat generally forms around much of the lake margin. Lake levels have risen ~2 m between 1971 and 1996. There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 9 Maximum Length (km): 5.8 Maximum Width (km): 2.1 Maximum Depth (m): 20 Surface Area (km^2): 7.08 Ice Thickness Average Surface (m): 3.3 - 4.5 Volume (m^3 * 10^6): 25.2 163.259582519531 163.048782348633 -77.597076416016 -77.622711181641 18m 18m meter Lake Vida is a hypersaline lake in Victoria Valley, the northernmost of the large McMurdo Dry Valleys, on the continent of Antarctica. It is isolated under year-round ice cover, and is considerably more saline than seawater. Lake Vida is one of the largest lakes in the McMurdo Dry Valley region and is a closed-basin endorheic lake. The permanent surface ice on the lake is the thickest non-glacial ice on earth, reaching a depth of at least 21 metres or 69 ft. The ice at depth is saturated with brine that is seven times as saline as seawater. The high salinity allows the brine to remain liquid at an average yearly water temperature of 13 degrees Celsius or 9 farenheit. Hydrology: Lake Vida has at least three named inflows: Victoria River, Kite Stream, and Dune Creek. Victoria River passes through the Vida Basin into Victoria Valley, Victoria Land as ephemeral glacial meltwater from the Upper Victoria Glacier, draining from Victoria Upper Lake. Geology: In the vicinity of Lake Vida, a variety of geological features are noted, the most significant being glaciers, lakes, valleys, ridges, and summits. There are approximately 25 named glaciers within a 25 kilometres radius with the nearest being Upper Victoria Glacier, Packard Glacier, Clark Glacier, and Clio Glacier. Valley: Victoria 161.930999755859 161.930999755859 -77.388298034668 -77.388298034668 349m 349m meter Lake Hoare occupies a narrower portion of the Taylor Valley, dammed by the Canada Glacier. It would drain almost completely without this dam. There are a number of islands which may be related to an old terminal of Canada Glacier. The lake is fed primarily from direct runoff from the glacier, as well as meltwater streams. (Lake level rose ~1.5 m between 1972 and 1996). There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 15 Maximum Length (km): 4.2 Maximum Width (km): 1 Maximum Depth (m): 34 Surface Area (km^2): 1.94 Ice Thickness Average Surface (m): 3.1 - 5.5 Volume (m^3 * 10^6): 17.5 162.935836791992 162.784423828125 -77.623085021973 -77.639259338379 73m 73m meter LTER Core Areas population dynamics None <cntorg>McMurdo Dry Valleys LTER</cntorg> <onlink>http://mcmlter.org/</onlink> <span property="dc:title" content="McMurdo Dry Valleys LTER" class="rdf-meta element-hidden"></span> Name: Nicole M DeCrappeo Role: lab crew Name: Inigo San Gil Role: data manager Not Applicable Not Applicable Field and/or Lab Methods  General sampling sites representative of the dominant local environment were selected at each location. Nine grid points within a 1 m2 frame, oriented to the north, were sampled. Three equidistant samples were taken along the north side, through the middle and along the south side of the quadrat parallel to one another. These nine samples were labled "a" through "i" for each quadrat.  Sampling bags were prepared with one sterile 'Whirlpak' bag and clean plastic scoop per sample. Samples were taken from within the 85 cm diameter circular area of each plot. The location of the sampling was recorded each year so that areas were not re-sampled. Using the plastic scoop, soil was collected to 10 cm depth. Very large rocks (&gt;20 mm diameter) were excluded from the sample. The soil was shoveled into the 'Whirlpak' bag until three quarters full (about 1.5 kg soil). The soil was mixed well in the bag, then the bag was closed tightly, expelling as much air as possible. The soil samples were stored in a cooler for transportation. On return to the laboratory (within 8 hours of sampling), the soils were stored at -8C until further processing.   In the laboratory, soil samples were handled in a laminar flow hood to prevent contamination. The Whirlpak bags of soil were mixed thoroughly prior to opening. A sub-sample of approximately 50g was removed and placed in a pre-weighed aluminum soil can, and weighed on a balance accurate to 0.01g. This sample was dried at 105C for 24 hours. The sample was removed, placed in a desiccator to cool down, and re-weighed. These data were used to calculate water content of the soil.   Locations are: Adjacent to Lake Hoare, Cape Royds, Lake Fryxell, Lake Bonney, Lake Victoria, Lake Vida, Clark Glacier, Labyrinth, Lake Vanda and Lake Brownworth. Original data are stored in Room A208,  Natural and Environmental Sciences Building, Colorado State University.  General sampling sites representative of the dominant local environment were selected at each location. Nine grid points within a 1 m2 frame, oriented to the north, were sampled. Three equidistant samples were taken along the north side, through the middle and along the south side of the quadrat parallel to one another. These nine samples were labled "a" through "i" for each quadrat.  Sampling bags were prepared with one sterile 'Whirlpak' bag and clean plastic scoop per sample. Samples were taken from within the 85 cm diameter circular area of each plot. The location of the sampling was recorded each year so that areas were not re-sampled. Using the plastic scoop, soil was collected to 10 cm depth. Very large rocks (>20 mm diameter) were excluded from the sample. The soil was shoveled into the 'Whirlpak' bag until three quarters full (about 1.5 kg soil). The soil was mixed well in the bag, then the bag was closed tightly, expelling as much air as possible. The soil samples were stored in a cooler for transportation. On return to the laboratory (within 8 hours of sampling), the soils were stored at -8C until further processing. In the laboratory, soil samples were handled in a laminar flow hood to prevent contamination. The Whirlpak bags of soil were mixed thoroughly prior to opening. A sub-sample of approximately 50g was removed and placed in a pre-weighed aluminum soil can, and weighed on a balance accurate to 0.01g. This sample was dried at 105C for 24 hours. The sample was removed, placed in a desiccator to cool down, and re-weighed. These data were used to calculate water content of the soil. Locations are: Adjacent to Lake Hoare, Cape Royds, Lake Fryxell, Lake Bonney, Lake Victoria, Lake Vida, Clark Glacier, Labyrinth, Lake Vanda and Lake Brownworth. Original data are stored in Room A208,  Natural and Environmental Sciences Building, Colorado State University. unknown bdso comma delimited file with the data for bdso LOCATION Name of area where measurement was made The data provider Name of area where measurement was made DATE_TIME Date on which sample was gathered The data provider calendar date/time mm/dd/yyyy gregorian calendar SAMPLE # Sample ID associated with transect, sampling location The data provider Sample ID associated with transect, sampling location SOIL WATER CONTENT (%) Percent water found in soil The data provider 0 100 dimensionless 0.0001 COMMENTS Helpful hints about the sample The data provider Helpful hints about the sample FILE NAME Name of file in which data was stored The data provider Name of file in which data was stored McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 1 column , https://mcm.lternet.edu/sites/default/files/bdso.csv None 2014-11-11 2014-11-11 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