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Science 8 October 1999:
Vol. 286. no. 5438, pp. 283 - 286
DOI: 10.1126/science.286.5438.283
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Reports
Tributaries of West Antarctic Ice Streams Revealed by RADARSAT Interferometry
Ian Joughin,
1*
Laurence Gray,
2
Robert Bindschadler,
3
Stephen Price,
4
David Morse,
5
Christina Hulbe,
3
Karim Mattar,
2
Charles Werner
1
Interferometric RADARSAT data are used to map ice motion in the
source areas of four West Antarctic ice streams. The data reveal that
tributaries, coincident with subglacial valleys, provide a spatially
extensive transition between slow inland flow and rapid ice stream flow
and that adjacent ice streams draw from shared source regions. Two
tributaries flow into the stagnant ice stream C, creating an extensive
region that is thickening at an average rate of 0.49 meters per year.
This is one of the largest rates of thickening ever reported in
Antarctica.
1 Jet Propulsion Laboratory, California
Institute of Technology, M/S 300-235, 4800 Oak Grove Drive, Pasadena,
CA 91109, USA.
2 Canada Centre for Remote Sensing,
Applications Division, 588 Booth Street, Ottawa, Ontario K1A 0Y7,
Canada.
3 Code 971, Oceans and Ice Branch,
NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA.
4 SAIC General Sciences Corporation, 4600 Powder
Mill Road, Beltsville, MD 20705-2675, USA.
5 Institute for Geophysics, University of Texas at
Austin, 4412 Spicewood Springs Road #600, Austin, TX 78759, USA.
*
To whom correspondence should be addressed. E-mail:
ian{at}radar-sci.jpl.nasa.gov
Read the Full Text
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