February 28, 2007
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FROM VOLUME 11, NUMBER 8, AUGUST 1998
Fast Recession of a West Antarctic Glacier, E. J. Rignot (Jet
Propulsion Lab., Calif. Inst. Technol., MS 300- 235, Pasadena, CA,
91109-8099; email@example.com. nasa.gov),Science 281 (5376),
549-551 (July 24, 1998).
Satellite radar data on the Pine Island Glacier in West Antarctica
revealed the up-and-down flexing of the glacial tongue as tides rose and
fell beneath it. The grounding point formed a hinge for this motion, and
the location of that hinge could be tracked from 1992 to 1996. During
those five years, the hinge line retreated about 1.2 km per year, implying
that the ice thinned by about 3.5 m per year. These actions were
attributed to melting of the base of the glacier by the relatively warm
Pacific Ocean waters that undercut it.
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