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376 results for “McMurdo Dry Valleys”
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean maximum) in units of celsius on a monthly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean maximum) measurements in celsius units and were aggregated to a monthly timescale.
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean maximum) in units of celsius on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean maximum) measurements in celsius units and were aggregated to a yearly timescale.
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean) in units of celsius on a monthly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean) measurements in celsius units and were aggregated to a monthly timescale.
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean) in units of celsius on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean) measurements in celsius units and were aggregated to a yearly timescale.
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean minimum) in units of celsius on a monthly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean minimum) measurements in celsius units and were aggregated to a monthly timescale.
McMurdo Dry Valleys site, station Von Guerard Stream at F6, study of water temperature (mean minimum) in units of celsius on a yearly timescale
The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from McMurdo Dry Valleys (MCM) contains water temperature (mean minimum) measurements in celsius units and were aggregated to a yearly timescale.
McMurdo Dry Valleys Stream Transects - Soil Moisture
Investigation of the effect of hydrological and biogeochemical linkages in the transition zone between streams and surrounding soils on invertebrate community structure as part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project. The invertebrate community structure with relation to soil moisture, salinity, and chlorophyll-a was determined. The study took place on 28 November 1997 and 31 December 1997 in the Von Guerard Stream/Harnish Creek network.
McMurdo Dry Valley Relict Channel Locations
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, water was diverted to a relict stream channel in order to reactivate the streamflow. The purpose of this experiment was to quantify the time scales of response to the arrival of water after many years of dessication. This table contains data showing the measurement locations (latitude, longitude and elevation) for the Relict Channel in the Fryxell basin.
McMurdo Dry Valleys Biological responses to landscape change in the McMurdo Dry Valleys, Antarctica
The McMurdo Dry Valleys, Antarctica, are experiencing rapid landscape scale change including increased glacial melt, the expansion of water tracks, thermokarst formation, an increase in the extent of the soil active layer, lake level rise, and altered stream flow. The impacts of these changes for biological communities are currently unknown. The goal of this study was to conduct surveys and experiments in three Dry Valley soil habitats that are expected to undergo change: water tracks, lake margins, and active layer profiles. Specifically, samples were collected from: 1) transects spanning dry-wet-dry soils in two water tracks in different lake basins, including three transects from each of three reaches for each water track, 2) experiments in which water and varying levels of salt were added to dry soils immediately adjacent to water tracks, 3) transects in lake margin soils in two different lake basins, including four transects perpendicular to each lake that span wet-to-dry soils, 4) experiments in which sterilized and non-sterilized lake water were added to dry soils adjacent to lakes, 5) the soil active layer from a total of eight soil pits in two different lake basins that were sampled at 5cm increments of depth, from the surface to 30cm or the permafrost, whichever was encountered first, and 6) experiments in which soils from the bottom of the soil active layer were moved to the upper layer and vice versa. Bacterial communities were sequenced for each sample and edaphic characteristics were measured for a subset of samples.
McMurdo Dry Valley 1995 Tracer Experiment Locations
As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a 1995 tracer experiment was conducted in Green Creek. For details of this experiment, please contact Diane McKnight
McMurdo Dry Valleys Garwood Ice Cliff Meteorological Station Measurements, 2012-
   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 Ice Cliff meteorology  station. This station reported data for about a year, during 2011. On January 10, 2012 the station was being transferred to the custody of the MCM LTER program by Joe Levy (UT), completing of the handover on the Austral summer of 2014. The GAFM station was moved ~5 m from its original site in 2013 (out of the stream bed).     The Garwood ice cliff met station ceased operations in 2013.   Â
McMurdo Dry Valleys Beacon Valley 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 Beacon Valley meteorology station daily averages, as derived from the 15-min data. Beacon ceased operations in the 2012 season.
McMurdo Dry Valleys Lake Bonney Snowfence 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 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. Here we offer the daily averages based on the 15-min frequency data for the Lake Bonney Snowfence station.
McMurdo Dry Valleys Garwood Ice Cliff Meteorological Station Daily Averages, 2012-
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 Ice Cliff meteorology station. This station reported data for about a year, during 2011. On January 10, 2012 the station was being transferred to the custody of the MCM LTER program by Joe Levy (UT), completing of the handover on the Austral summer of 2014. The GAFM station was moved ~5 m from its original site in 2013 (out of the stream bed).
McMurdo Dry Valleys Lake Bonney Snowfence 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 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. Here we offer the monthly averages based on the 15-min frequency data for the Lake Bonney Snowfence station.
McMurdo Dry Valleys LTER: Phytoplankton water column profiles in Lake Bonney, Antarctica from 2004 to 2015
Lake Bonney (McMurdo Dry Valleys, east Antarctica) represents a year-round refugia for life adapted to extreme conditions. Lake level has risen by more than 3 m since 2004, but impacts of rapid lake level rise on phytoplankton community structure is also poorly understood. From 2004 to 2015, in concert with the summer limnological samplings, an in situ submersible spectrofluorometer (bbe FluoroProbe) was used to profile phytoplankton throughout the water columns of east and west lobes Lake Bonney to quantify the vertical structure of four functional algal groups (green algae, brown/mixed algae, cryptophytes, cyanobacteria). Our findings showed that phytoplankton communities were differentially impacted by physical and chemical factors over long-term vs. seasonal time scales. Following a summer of rapid lake level rise (2010-11), an increase in depth integrated chlorophyll a (chl-a) occurred in Lake Bonney caused by stimulation of photoautotrophic green algae. Collectively our data reveal that phytoplankton groups possessing variable trophic abilities are differentially competitive during seasonal and long-term time scales owing to periods of higher nutrients (photoautotrophs) vs. light/energy limitation (mixotrophs).
McMurdo Dry Valleys Huey Creek streamflow routing and subsurface water flow, 2006
Huey Creek is a meltwater stream that flows into the north end of Lake Fryxell in Taylor Valley.  We conducted a comparative study to determine flow balances, flow routing in Huey Creek in 2006. The hypothesis is that truncated hydrographs on Huey Creek (and other streams) are related to large subsurface storage potential that fills/empties over the daily flood pulse. The goal of the simulation and experimental data comparison described here  is to use a coupled groundwater / surface flow model to test this hypothesis.  Representative figure: Simulated and observed discharges for (A) the full model; B) kinematic wave routing and subsurface flow, but no anabranching; C) kinematic wave routing, but no subsurface flow, and no anabranching. D) displays the difference between observations and the upstream boundary condition for each simulation.
McMurdo Dry Valleys Streamflow and hyporheic thermal regimes influence on hyporheic storage and exchange at Von Guerard Stream, 2006
We describe the modeling data created and used to study the influence of stream and hyporheic thermal regimes on hyporheic storage and exchange, as well as the field data used in the study. Models and methodologies are also described, along with the physical details of the data. In streams, such as those in the McMurdo Dry Valleys, that experience large daily fluctuations in temperature, associated changes in water density and dynamic viscosity could affect hyporheic characteristics.  Figure: Longitudinal view of stream and hyporheic temperatures at each of the 11 temperature proble locations at two different times. One time, 8:30, was in the middle of the cool morning experiment, the second time, 15:00 was in the middle of the warm afternoon experiment.  Open circles represent stream temperatures. Filled diamonds, squares, and triangles represent temperatures at 5, 10, and 20 cm depths below the streambed surface, respectively
McMurdo Dry Valleys Glacier melt modeling: Long Wave Radiation 1996-2011
This is the data and metatada for modeled Long Wave Radiation - part of six modeled parameters that comprise the Taylor Valley Galcier Melt modeling Data contained and described in this document correspond to the physically-based surface energy balance model for the glaciers of Taylor Valley developed by the dataset owners. The spatial variability in ablation (ice melt and sublimation), runoff, and climate sensitivity of the glaciers was modeled using 16 years of meteorological and surface mass balance (the net mass gain or loss of ice on the surface of the glacier) observations collected in Taylor Valley (see figure). Â An unusual aspect of the model is the inclusion of transmission of solar radiation into the ice and subsequent drainage of some subsurface melt . Â Melt model was applied to the ablation zones of the glaciers of Taylor Valley, identified by colored areas. Mass balance stakes, meteorological stations, and stream gages shown for reference. These output files are part of a multi set comprising 5 outputs and one input dataset. Â The input dataset package is at http://mcmlter.org/content/glacier-melt-modeling-inputs-and-example-m-fi...
McMurdo Dry Valleys Glacier melt modeling: Short Wave Radiation 1996-2011
This is the data and metatada for modeled Long Wave Radiation - part of six modeled parameters that comprise the Taylor Valley Galcier Melt modeling Data contained and described in this document correspond to the physically-based surface energy balance model for the glaciers of Taylor Valley developed by the dataset owners. The spatial variability in ablation (ice melt and sublimation), runoff, and climate sensitivity of the glaciers was modeled using 16 years of meteorological and surface mass balance (the net mass gain or loss of ice on the surface of the glacier) observations collected in Taylor Valley (see figure).  An unusual aspect of the model is the inclusion of transmission of solar radiation into the ice and subsequent drainage of some subsurface melt .  Melt model was applied to the ablation zones of the glaciers of Taylor Valley, identified by colored areas. Mass balance stakes, meteorological stations, and stream gages shown for reference. This dataset package is part of a 6-pack multi-set, which you can find at http://mcmlter.org The input files, parameters and examples are found in this package: http://mcmlter.org/content/glacier-melt-modeling-inputs-and-example-m-fi...Â
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