Sustained increase in ice discharge fromthe Amundsen Sea Embayment, West Antarctica, from1973 to 2013
Sustained increase in ice discharge fromthe Amundsen Sea Embayment, West Antarctica, from1973 to 2013
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DOI：
10.1002/2013gl059069
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发表时间：
2014-03-16
影响因子：
5.2
通讯作者：
Scheuchl, B.
中科院分区：
文献类型：
--
作者：
Mouginot, J.;Rignot, E.;Scheuchl, B.
我们结合联合收割机测量的冰速度从陆地卫星特征跟踪和卫星雷达干涉测量，冰厚度从现有的汇编文件41年的质量通量从阿蒙森海湾（ASE）西南极洲。自1973年以来，总冰流量增加了77%。增长的一半发生在2003年至2009年。松岛冰川的地线冰速在经历了十年的快速加速后，在2009年至2013年期间趋于稳定，但这种加速到达了遥远的内陆，并且发生的速度比平流过程预测的要快。经过十年的接近稳定后，2006年后，穿过斯韦茨冰川的流速迅速增加，导致2006年至2013年之间流量增加了33%。海恩斯、史密斯、波普和科勒冰川在整个研究期间都在加速移动。冰流量的持续增加可能是南极洲这一部分海洋冰盖不稳定发展的一个指标。
We combine measurements of ice velocity from Landsat feature tracking and satellite radar interferometry, and ice thickness from existing compilations to document 41 years of mass flux from the Amundsen Sea Embayment (ASE) of West Antarctica. The total ice discharge has increased by 77% since 1973. Half of the increase occurred between 2003 and 2009. Grounding-line ice speeds of Pine Island Glacier stabilized between 2009 and 2013, following a decade of rapid acceleration, but that acceleration reached far inland and occurred at a rate faster than predicted by advective processes. Flow speeds across Thwaites Glacier increased rapidly after 2006, following a decade of near-stability, leading to a 33% increase in flux between 2006 and 2013. Haynes, Smith, Pope, and Kohler Glaciers all accelerated during the entire study period. The sustained increase in ice discharge is a possible indicator of the development of a marine ice sheet instability in this part of Antarctica.