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Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica
Scambos, T.A.; Bohlander, J.A.; Shuman, C.A.; Skvarca, P. (2004). Glacier acceleration and thinning after ice shelf collapse in the Larsen B embayment, Antarctica. Geophys. Res. Lett. 31: L18402(1-4)
In: Geophysical Research Letters. American Geophysical Union: Washington. ISSN 0094-8276, more
Peer reviewed article  

Available in Authors 

Keywords
    Hydrology; Remote sensing; PSW, Antarctica, Antarctic Peninsula, Larsen Ice S [Marine Regions]; Marine

Authors  Top 
  • Scambos, T.A.
  • Bohlander, J.A.
  • Shuman, C.A.
  • Skvarca, P.

Abstract
    Ice velocities derived from five Landsat 7 images acquired between January 2000 and February 2003 show atwo- to six-fold increase in centerline speed of four glaciers flowing into the now-collapsed section of the Larsen B Ice Shelf. Satellite laser altimetry from ICESat indicates the surface of Hektoria Glacier lowered by up to 38 ± 6 m in a six-month period beginning one year after the break-up in March 2002. Smaller elevation losses are observed for Crane and Jorum glaciers over a later 5-month period. Two glaciers south of the collapse area, Flask and Leppard, show little change in speed or elevation. Seasonal variations in speed preceding the large post-collapse velocity increases suggest that both summer melt percolation and changes in the stress field due to shelf removal play a major role in glacier dynamics.

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