期刊
SCIENCE
卷 341, 期 6151, 页码 1236-1239出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1239373
关键词
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资金
- NSF's Office of Polar Programs under NSF [ANT-0732926]
- NASA's Cryospheric Sciences Program
- New York University Abhu Dabi grant [1204]
- Natural Environment Research Council-British Antarctic Survey Polar Science for Planet Earth Program
- Natural Environment Research Council [bas0100027] Funding Source: researchfish
- NERC [bas0100027] Funding Source: UKRI
Ice shelves play a key role in the mass balance of the Antarctic ice sheets by buttressing their seaward-flowing outlet glaciers; however, they are exposed to the underlying ocean and may weaken if ocean thermal forcing increases. An expedition to the ice shelf of the remote Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet that has rapidly thinned and accelerated in recent decades, has been completed. Observations from geophysical surveys and long-term oceanographic instruments deployed down bore holes into the ocean cavity reveal a buoyancy-driven boundary layer within a basal channel that melts the channel apex by 0.06 meter per day, with near-zero melt rates along the flanks of the channel. A complex pattern of such channels is visible throughout the Pine Island Glacier shelf.
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