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.
复制标题

DOI:
10.1126/sciadv.abd7254
复制
发表时间:
2021-04
期刊:
影响因子:
13.6
通讯作者:
Heywood KJ
Heywood KJ
中科院分区:
综合性期刊1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

文献摘要

参考文献

被引文献

相似文献

思韦茨冰架前缘下方的首次海洋学观测显示了以前未知的暖流路径。思韦茨冰川是南极西部冰盖变化最快的出口,给 21 世纪海平面上升预测带来了很大的不确定性。在这里,我们首次对思韦茨冰架前缘下方的海洋温度、盐度和氧气进行直接观测,由自动水下航行器收集。根据这些数据,确定了水流入空腔的路径和修改。中央冰架下方的深水来自于之前被低估的从松岛湾进入冰洞的东部暖水分支。在北部的两个海底海槽中发现了温暖的流入和富含融水的流出。空间属性梯度突出了一个槽中以前未知的汇聚区域,不同的水团在此相遇并混合。我们的观察显示,温暖的海水从四面八方冲击着对冰架稳定性至关重要的固定点,这种情况可能会导致冰架脱落和后退。
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.
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
DOI: 10.1038/s41561-020-0616-z
发表时间: 2020-09
期刊: Nature geoscience
影响因子: 18.3
作者:
Adusumilli S;Fricker HA;Medley B;Padman L;Siegfried MR
通讯作者: Siegfried MR
DOI: 10.1002/2014gl060140
发表时间: 2014-05-28
影响因子: 5.2
作者:
Rignot, E.;Mouginot, J.;Scheuchl, B.
通讯作者: Scheuchl, B.
DOI: 10.1002/2014gl061600
发表时间: 2014-11-28
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.