Dataset Results
As part of the McMurdo Dry Valleys Long Term Ecological Research program, continuous stage (lake level), ice surface ablation, surface PAR, and underwater PAR are collected at various lakes throughout the McMurdo Dry Valleys of Antarctica. This package contains data measured at 20 minute intervals for Lake Fryxell, Lake Hoare, East Lake Bonney, and West Lake Bonney in Taylor Valley as well as Lake Miers in Miers Valley. MCM sometimes refers to these measurements as "blue box" data because the instrumentation used to be housed in a blue box.
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As part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project, ice thickness and density are measured annually for several lakes located throughout this region of Antarctica. Ice thickness is measured from the bottom of the ice cover to the piezometric water level and to the top of the ice cover. Because most limnological sampling holes are drilled in low-lying areas, it was thought that ice thickness measurements were biased. Therefore, random ice thickness measurements were performed in a 1000 m2 sampling grid on each lake in past years.
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Detailed physical descriptions of lakes found in the McMurdo Dry Valleys.
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.
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Manual lake level surveys are conducted each season for several lakes across the McMurdo Dry Valleys of Antarctica. This data package includes lake levels for Lake Fryxell, Lake Hoare, and Lake Bonney, located in Taylor Valley; Lake Vanda and Don Juan Pond, located in Wright Valley; Lake Vida, located in Victoria Valley; Lake Miers, located in Miers Valley; and Lake House and Lake Joyce, located in Pearse Valley.
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An important part of the McMurdo Long Term Ecological Research (LTER) is evaluating carbon and nitrogen budgets in perennial ice-covered lakes. This dataset addresses this core area of research and quantifies the particulate organic carbon (POC) and nitrogen (PON) found at specific depths in lakes across the McMurdo Dry Valleys of Antarctica.
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The McMurdo Long Term Ecological Research (LTER) project monitors patterns of inorganic material transport in perennial ice-capped lakes. This data set addresses this core area of research and quantifies dissolved inorganic carbon concentrations at specific depths in McMurdo Dry Valley lakes. Dissolved inorganic carbon is also necessary for the computation of primary productivity.
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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 conductivity, temperature, and depth (CTD). A Seabird instrument was used to record CTD profiles in these perennial ice covered lakes.
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As part of the McMurdo Long Term Ecological Research (LTER) project in the Dry Valleys of Antarctica, hydrogen ion concentrations were monitored in various lakes of the region. An Orion portable pH meter was used to record hydrogen ion concentrations at depth specific intervals in perennial ice-covered lakes.
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An important part of the McMurdo Long Term Ecological Research (LTER) project is identifying patterns and movements of nutrients in perennial ice-covered lakes. This dataset addresses this core area of research and quantifies macronutrient concentrations (NH4+, NO3-, NO2, SRP) found at specific depths in McMurdo Dry Valley lakes.
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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.
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Basic raster layers from the MCM-LTER spatial data holdings have been exported and symbolized. The dataset files offered here include:
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As part of the McMurdo Dry Valleys Long Term Ecological Research program, continuous stage (lake level), ice surface ablation, surface PAR, and underwater PAR are collected at various lakes throughout the McMurdo Dry Valleys of Antarctica. This package contains daily measurement summaries derived from high frequency data for Lake Fryxell, Lake Hoare, East Lake Bonney, and West Lake Bonney in Taylor Valley as well as Lake Miers in Miers Valley. MCM sometimes refers to these measurements as "blue box" data because the instrumentation used to be housed in a blue box.