期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-020-17527-4
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology [JP17K12811, JP17H01615, JP25241001, JP17H01157, JP17H06316, JP17H06317, JP17H06322, JP17H06323, JP17H04710, JP26740007, JP19K12301, JP20K12132]
- Science Program of Japanese Antarctic Research Expedition (JARE) as Prioritized Research Project
- National Institute of Polar Research (NIPR) [KP-303]
- Center for the Promotion of Integrated Sciences of SOKENDAI
- Institute of Low Temperature Science, Hokkaido University
- NERC [bas0100033] Funding Source: UKRI
Mass loss from the Antarctic ice sheet, Earth's largest freshwater reservoir, results directly in global sea-level rise and Southern Ocean freshening. Observational and modeling studies have demonstrated that ice shelf basal melting, resulting from the inflow of warm water onto the Antarctic continental shelf, plays a key role in the ice sheet's mass balance. In recent decades, warm ocean-cryosphere interaction in the Amundsen and Bellingshausen seas has received a great deal of attention. However, except for Totten Ice Shelf, East Antarctic ice shelves typically have cold ice cavities with low basal melt rates. Here we present direct observational evidence of high basal melt rates (7-16myr(-1)) beneath an East Antarctic ice shelf, Shirase Glacier Tongue, driven by southward-flowing warm water guided by a deep continuous trough extending to the continental slope. The strength of the alongshore wind controls the thickness of the inflowing warm water layer and the rate of basal melting. East Antarctic ice shelves typically have cold ice cavities with low basal melt rates. Here the authors direct observational evidence of high basal melt rates beneath Shirase Glacier Tongue in East Antarctica, driven by inflowing warm water guided by a deep continuous trough extending to the continental slope.
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