The
West Antarctic Ice Sheet (
WAIS) is the segment of the
continental ice sheet that covers
West Antarctica, the portion of
Antarctica on the side of the
Transantarctic Mountains that lies in the
Western Hemisphere. It is classified as a marine-based
ice sheet, meaning that its bed lies well below
sea level and its edges flow into floating ice shelves. The WAIS is bounded by the
Ross Ice Shelf, the
Ronne Ice Shelf, and outlet
glaciers that drain into the
Amundsen Sea.
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In the long term, the West Antarctic Ice Sheet is likely to disappear due to the warming which has already occurred.<a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>11<span>]</span></a>
Paleoclimate evidence suggests that this has already happened during the
Eemian period, when the global temperatures were similar to the early 21st century.<a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>12<span>]</span></a><a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>13<span>]</span></a> It is believed that the loss of the ice sheet would take place between 2,000 and 13,000 years in the future,<a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>14<span>]</span></a><a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>15<span>]</span></a> although several centuries of high emissions may shorten this to 500 years.<a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>16<span>]</span></a> 3.3 m (10 ft 10 in) of sea level rise would occur if the ice sheet collapses but leaves ice caps on the mountains behind. Total sea level rise from West Antarctica increases to 4.3 m (14 ft 1 in) if they melt as well,<a href="
West Antarctic Ice Sheet - Wikipedia"><span>[</span>2<span>]</span></a> but this would require a higher level of warmin
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