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Science 8 October 1999: Vol. 286. no. 5438, pp. 280 - 283 DOI: 10.1126/science.286.5438.280
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Reports
Past and Future Grounding-Line Retreat of the West Antarctic Ice Sheet
H. Conway,
1
B.
L. Hall,
2,3
G. H. Denton,
2
A. M. Gades,
1
E. D. Waddington
1
The history of deglaciation of the West Antarctic Ice Sheet
(WAIS) gives clues about its future. Southward grounding-line migration was dated past three locations in the Ross Sea Embayment. Results indicate that most recession occurred during the middle to late
Holocene in the absence of substantial sea level or climate forcing.
Current grounding-line retreat may reflect ongoing ice recession that
has been under way since the early Holocene. If so, the WAIS could
continue to retreat even in the absence of further external forcing.
1 Geophysics Program, University of Washington,
Seattle, WA 98195, USA.
2 Institute for
Quaternary Studies and Department of Geological Sciences, University of
Maine, Orono, ME 04469, USA.
3 Department of Geology
and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA
02543, USA.
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