Physics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3118402s&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 18, CiteID L18402
Physics
56
Global Change: Remote Sensing, Hydrology: Glaciology (1863), Hydrology: Snow And Ice (1827)
Scientific paper
Ice velocities derived from five Landsat 7 images acquired between January 2000 and February 2003 show a two- 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.
Bohlander J. A.
Scambos Ted A.
Shuman Christopher A.
Skvarca Pedro
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