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West Antarctic Glacier Ice Flows and Elevation Change

This animation shows glacier changes detected by ATM, ICESat and ice bridge data in the highly dynamic Amundsen Embayment of West Antarctica. We know that ice speeds in this area have increased dramatically from the late 1990s to the present as the ice shelves in this area have thinned and the bottom of the ice has lost contact with the bed beneath. As the ice has accelerated, ice upstream of the coast must be stretched more vigorously, causing it to thin. NASA-sponsored aircraft missions first measured the ice surface height in this region in 2002, followed by ICESat data between 2002 and 2009. Ice Bridge aircraft have measured further surface heights in 2009 and 2010, and these measurements continue today. Integrating these altimetry sources allows us to estimate surface height changes throughout the drainage regions of the most important glaciers in the region. We see large elevation changes at the coast on Thwaites glacier, at the center of the images, and large and accelerating elevation changes extending inland from the coast on Pine Island and Smith glaciers, to the left and right of the images, respectively. The changes on Pine Island and Smith glaciers mark these as potential continuing sources of ice to the sea, and they have been surveyed in 2011 by Ice Bridge aircraft and targeted for repeat measurements in coming years.
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Animation showing ice velocity and elevation change with dates, labels and colorbars.    Animation showing ice velocity and elevation change with dates, labels and colorbars.
Duration: 43.0 seconds
Available formats:
  1920x1080 (30 fps) MPEG-4   49 MB
  1280x720 (30 fps) MPEG-4   20 MB
  1280x720 (60 fps) MPEG-4   38 MB
  640x360 (30 fps) MPEG-4   5 MB
  1920x1080 (60 fps) Frames (Composite)
  1920x1080 (30 fps) Frames (Composite)
  1280x720 (60 fps) Frames (Composite)
  1280x720 (30 fps) Frames (Composite)
  320x180     PNG           66 KB
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The above animation without the title, date and colorbar overlay    The above animation without the title, date and colorbar overlay
Duration: 43.0 seconds
Available formats:
  1280x720 (30 fps) MPEG-4   20 MB
  1920x1080 (60 fps) Frames (Antarctic)
  1920x1080 (30 fps) Frames (Antarctic)
  1280x720 (60 fps) Frames (Antarctic)
  1280x720 (30 fps) Frames (Antarctic)
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The label, date and colorbar overlay with transparency    The label, date and colorbar overlay with transparency

Available formats:
  1920x1080 (60 fps) Frames (DateOverlay)
  1920x1080 (30 fps) Frames (DateOverlay)
  1280x720 (60 fps) Frames (DateOverlay)
  1280x720 (30 fps) Frames (DateOverlay)
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The color bar used to show the ice velocity vector flows
   The color bar used to show the ice velocity vector flows

Available formats:
  320 x 90           PNG         8 KB



The color bar used to show the change in elevation
   The color bar used to show the change in elevation

Available formats:
  320 x 90           PNG         8 KB

Short URL to This Page:http://svs.gsfc.nasa.gov/goto?3875
Animation Number:3875
Completed:2011-11-02
Animator:Cindy Starr (GST) (Lead)
Producer:Jefferson Beck (USRA)
Scientist:Benjamin E. Smith (University of Washington Applied Physics Lab Polar Science Center)
Project Support:James W. Williams (GST)
 Shiloh Heurich (GST)
Platforms/Sensors/Data Sets:ICESat/GLAS/L2 Global Land Surface Altimetry Data (Feb. 2003 to Nov. 2008)
 ERS-1 and ERS-2/SAR/Differential Interferometry (2008)
 Pre-IceBridge/LVIS/L2 Geolocated Ground Elevation and Return Energy Quartiles (2009, updated 2010)
 Pre-IceBridge/ATM/L2 Icessn Elevation, Slope, and Roughness (Nov. to Dec. 2002 and Nov. to Dec. 2004)
 Advanced Land Observation System (ALOS)/Phased-Array Synthetic-Aperture Radar (PALSAR)/L-band frequency (1.27 GHz) radar (1994 to 1996)
 Landsat-7/ETM+/Landsat Image Mosaic of Antarctica (Dec. 2002 to Feb. 2003)
 IceBridge/ATM/L2 Icessn Elevation, Slope, and Roughness (Sept. 2009 and Oct. 2010)
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio
 
Keywords:
DLESE >> Cryology
SVS >> HDTV
GCMD >> Earth Science >> Cryosphere
GCMD >> Earth Science >> Cryosphere >> Snow/Ice
GCMD >> Earth Science >> Hydrosphere >> Snow/Ice
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Glacier Elevation/Ice Sheet Elevation
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Glacier Motion/Ice Sheet Motion
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Glacier Thickness/Ice Sheet Thickness
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Glaciers
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Ice Sheets
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Depth/Thickness
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Motion
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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