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23 December, 2008

New A-CAP Data Sets and Basemaps Available


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NSIDC has released the following data sets for access through the AGDC Antarctic Cryosphere Access Portal (A-CAP).

  • Blankenship, D. D., D. L. Morse, C. A. Finn, R. E. Bell, M. E. Peters, S. D. Kempf, et al. 2001. Ice thickness and surface elevation, southeastern Ross Embayment, West Antarctica. (NSIDC-0099). To access this data set from the A-CAP Web page, expand the AGDC NSF PI data sets menu. Click on list by > investigator, and select the data set.  Available maps include elevation and ice thickness. (Figure 1)
  • Cuffey, K., A. Bliss, J. Kavanaugh, and S. Aciego. 2007. Surface velocities of Taylor Glacier, Antarctica (NSIDC-0324). To access this data set, expand the AGDC NSF PI data sets menu, click on list by > investigator, and select the data set. The data set includes maps of elevation, velocity magnitude, and North, East, and vertical velocity of Taylor Glacier.
map images from Blankenship data set
Figure 1. Left: Ice thickness map from Blankenship, et al. Right: Surface elevation map from Blankenship, et al.
—Credit:
NSIDC

  • Monaghan, A. J., D. H. Bromwich, and S.-H. Wang. 2006. Recent trends in Antarctic snow accumulation from Polar MM5 simulations. To access this data set through A-CAP, expand the basemap layer menu, and click on climate variables.The Monaghan data set is listed under accumulation, and can be viewed as a grayscale, graded, or contour map. (Figure 2)
  • Van de Berg, W. J., M. R. van den Broeke, C. H. Reijmer, and E. van Meijgaard. 2005. Characteristics of the Antarctic surface mass balance, 1958-2002, using a regional atmospheric climate model. To access this data set through A-CAP, expand the basemap layer menu, and click on climate variables. The Van de Berg data set is listed under Surface Mass Balance (SMB), and can be viewed as a grayscale, graded, or contour map. (Figure 3)

antarctica map
Figure 2. Graded accumulation map from Monaghan et al.
—Credit: NSIDC
antarctica map
Figure 3. Contour map of surface mass balance from Van de Berg et al. —Credit: NSIDC

A-CAP is a geo-visualization and data download tool developed at the National Snow and Ice Data Center (NSIDC) Antarctic Glaciological Data Center (AGDC). A-CAP provides AGDC data and other Antarctic-wide parameters, including glaciology, ice core data, snow accumulation, satellite imagery, Digital Elevation Models (DEM's), sea ice concentration, and many other cryosphere-related scientific measurements. For more information on how to access data using A-CAP, see the A-CAP User Manual.

We welcome your feedback on this project, which is currently in active development. If you have questions, comments or suggestions, please contact the A-CAP Team. A-CAP is developed using MapServer, an open source development environment for building spatially-enabled Internet applications.