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2,021 results for “valley”
McMurdo Dry Valleys Mineralogic composition of cryogenic evaporites determined by low-temperature X-ray diffactometry
As part of a collaborative investigation between researchers at Rice University, Arkansas State University, University of Rochester, and Ohio State University, lakes of the McMurdo Dry Valleys were sampled at discreet depth intervals during the 2005-2006 field season.  Sample splits were subsequently analyzed for chemical and isotopic composition of both gases and dissolved  ions, as well as dissolved organic carbon. In addition, cryogenic salts were sampled in the surrounding lake shores in order to determine the salt sources. Gravity cores were also obtained and in the case of Lake Vanda, a white precipitate was recovered from the lake bottom.        Presented  in this file is the mineralogic composition of salt crusts that were collected on the surface of sediment and rocks surrounding the lakes, as well as the lake-bottom precipitate from Lake Vanda.  The results are based on low-temperature XRD determinations, and Rietveld refinement of whole peaks.       Â
McMurdo Dry Valleys Gas, Tritium, Stable Isotope, and Major Ion data for lake waters: 2005-2006 Antarctic Season
Data of dissolved gas, tritium, stable isotopes, and major ion for Lake Vanda (Wright Valley), Lake Fryxell (Taylor Valley), Lake Hoare (Taylor Valley), and Lake Joyce (Pearce Valley): 2005-2006 Antarctic Season
McMurdo Dry Valleys Basic GIS Map Layers - up to 2007
Basic Layers from the MCM-LTER spatial data holdings have been exported and symbolized, and they are available for download here. Most of these layers date from Oct-2007 or earlier, please see the Polar GeoSpatial Center for more updated base and specialized layers. The spatial GIS layers contained in this ZIP file were exported from the 2006 MCM-LTER Spatial Database (now deprecated) in the ESRI Shape File format. For your convenience, Layer Files (.lyr),  which are already symbolized, are also included. The spatial layers contained in the MCM-LTER Spatial Database are accurate (depending on the date the shapefiles in this ZIP file were last exported, they may be out of date). List of layers:  Camp locations.lyr glacier stake locations.lyr glaciers.lyr lakes and ponds.lyr maximum extent.lyr met station locations.lyr ocean.lyr stream gauge locations.lyr streams - monitored.lyr streams - not monitored.lyr topo 50m.lyr Â
McMurdo Dry Valleys GIS Raster Layers
Basic raster layers from the MCM-LTER spatial data holdings have been exported and symbolized. The dataset files offered here include: 30m DEM made from USGS Topo map SPOT Satellite Image 39-558 LANDSAT 7 Satellite Image Note - the SPOT and LANDSAT layers are not MCM-LTER data products.  These resources were updated last in 2007, for more up-to-date layers, and potentially, higher resolution layers, please visit the Polar Geospatial Center and other affine geospatial data clearinghouses.Â
McMurdo Dry Valleys Temperature and Profiles (YSI) from 1993-2000
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a series of Taylor Valley lakes have been monitored for dissolved oxygen and temperature profiles. A YSI dissolved oxygen meter was used to record these measurements in the perennial ice-covered lakes of Taylor Valley. The measurements were collected from 1993 to 2000. Other methodologies to monitor temperatures and dissolved oxygen in lakes are being used.
McMurdo Dry Valleys Stable Isotope Data for Lake Chad
This micro data set contains stable isoptope data for water samples taken from Lake Chad. Although it is not part of the core monitoring program, it is potentially important.
McMurdo Dry Valleys Cation, Anion Concentrations Along Lake Sediment/Water Interface
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic aqueous geochemical sampling program has been undertaken. A series of water samples have been collected and analyzed for major ion chemistry by ion chromatography. The concentrations of ions cover a wide range of total dissolved solids from fresh to hypersaline lake waters. This dataset shows concentrations of lithium, sodium, potassium, magnesium, calcium, iron, chlorine, bromine, and SO4 found along the sediment/water interface of Taylor Valley lakes.
McMurdo Dry Valleys Bathymetric Polynomials
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, bathymetric data was collected for Lakes Hoare, Fryxell and Bonney. This table contains third order polynomial equations to fit the area vs. depth data of these lakes.
McMurdo Dry Valleys Bathymetric Hypsographic Function Values
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, bathymetric data was collected for Lakes Hoare, Fryxell and Bonney. This table contains the area, volume represented in a given layer, and volume represented below a given depth for various depths in these lakes.
McMurdo Dry Valleys Beacon Valley Meteorological Station Measurements
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data for the Beacon Valley meteorology station. These data correspond to the Beacon met station. Beacon ceased operations in the 2012 season.
McMurdo Dry Valleys Lake Bonney Snowfence Meteorological Station Measurements
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Taylor, Wright and Victoria Valleys. These files contain data for the Lake Bonney Snowfence station (in Taylor Valley). Measurements at this temporary met station ceased on April 2006.
McMurdo Dry Valleys F6 Snowfence Station Measurements
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Taylor, Wright and Victoria Valleys. These files contain data for the F6 Snowfence station (by Lake Fryxell, in Taylor Valley).
McMurdo Dry Valleys Upper Howard Meteorological Station Measurements
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data for the Upper Howard Glacier meteorology station. The Upper Howard Glacier meteorological station was added to the McMurdo Dry Valley network in the 2001-2002 field season in Taylor Valley and removed November 8, 2004.
McMurdo Dry Valleys Garwood Valley Meteorological Station Measurements, 2010-2011
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data for the Garwood Valley meteorology station. This station reported data for about a year, during 2011. On January 11, 2012 the station was disconnected and relocated to the Miers Valley. Met data for Garwood can be obtained visiting the Garwood Ice Cliff Met Station.
McMurdo Dry Valleys Depths, Areas, Volumes Measured by Jeffrey Schmok
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, bathymetric data was collected for Lakes Hoare, Fryxell and Bonney. This table contains areas, and volumes represented below a given depth for these lakes. Values were generated by Jeffrey Schmok based on field work he performed in November, 1995.
McMurdo Dry Valleys F6 Snowfence Station Daily Averages
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Taylor, Wright and Victoria Valleys. These files contain derived data for the daily averages for the F6 Snowfence station (by Lake Fryxell, in Taylor Valley) from 2000 to 2009
McMurdo Dry Valleys Upper Howard Meteorological Station Daily Averages
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data for the Upper Howard Glacier meteorology station daily averages, as derived from the 15-min high-frequency data. The Upper Howard Glacier meteorological station was added to the McMurdo Dry Valley network in the 2001-2002 field season in Taylor Valley and removed November 8, 2004.
McMurdo Dry Valleys Piezometric Depths for Taylor Valley Lakes
During the 95/96 Austral summer, the depth of the Lake Hoare and Lake Fryxell was measured at several points and dates using a piezometer. Lake Joyce and the West Lake Bonney's depth were also measured using this instrument at one location.
McMurdo Dry Valleys Beacon Valley Meteorological Station Monthly Averages
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Beacon, Taylor, Wright and Victoria Valleys. These files contain data for the Beacon Valley meteorology station montly averages, as derived from the 15-min data. Beacon ceased operations in the 2012 season.
McMurdo Dry Valleys F6 Snowfence Station Monthly Averages
As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, meteorological data was collected from various locations throughout Taylor, Wright and Victoria Valleys. These files contain derived data for the monthly averages for the F6 Snowfence station (by Lake Fryxell, in Taylor Valley) from 2000 to 2009
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