Pathways and modification of warm water flowing beneath Thwaites Ice Shelf, West Antarctica.
Pathways and modification of warm water flowing beneath Thwaites Ice Shelf, West Antarctica.
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DOI:
10.1126/sciadv.abd7254
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发表时间:
2021-04
期刊:
影响因子:
13.6
通讯作者:
Heywood KJ
中科院分区:
文献类型:
--
作者:
Wåhlin AK;Graham AGC;Hogan KA;Queste BY;Boehme L;Larter RD;Pettit EC;Wellner J;Heywood KJ
The first oceanographic observations underneath Thwaites Ice Shelf front show previously unknown pathways for warm currents. Thwaites Glacier is the most rapidly changing outlet of the West Antarctic Ice Sheet and adds large uncertainty to 21st century sea-level rise predictions. Here, we present the first direct observations of ocean temperature, salinity, and oxygen beneath Thwaites Ice Shelf front, collected by an autonomous underwater vehicle. On the basis of these data, pathways and modification of water flowing into the cavity are identified. Deep water underneath the central ice shelf derives from a previously underestimated eastern branch of warm water entering the cavity from Pine Island Bay. Inflow of warm and outflow of melt-enriched waters are identified in two seafloor troughs to the north. Spatial property gradients highlight a previously unknown convergence zone in one trough, where different water masses meet and mix. Our observations show warm water impinging from all sides on pinning points critical to ice-shelf stability, a scenario that may lead to unpinning and retreat.
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DOI:
10.1016/0011-7471(72)90040-x
发表时间:
1972-01-01
期刊:
DEEP-SEA RESEARCH
影响因子:
--
作者:
CALLAHAN, JE
通讯作者:
CALLAHAN, JE
影响因子:
18.3
作者:
Adusumilli S;Fricker HA;Medley B;Padman L;Siegfried MR
通讯作者:
Siegfried MR
影响因子:
5.2
作者:
Rignot, E.;Mouginot, J.;Scheuchl, B.
通讯作者:
Scheuchl, B.
影响因子:
5.2
作者:
Nakayama, Y.;Timmermann, R.;Hellmer, H. H.
通讯作者:
Hellmer, H. H.
DOI:
10.1016/j.dsr.2013.04.001
发表时间:
2013-07-01
影响因子:
2.4
作者:
Nakayama, Y.;Schroeder, M.;Hellmer, H. H.
通讯作者:
Hellmer, H. H.