Widespread, rapid grounding line retreat of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica, from 1992 to 2011
Widespread, rapid grounding line retreat of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica, from 1992 to 2011
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DOI：
10.1002/2014gl060140
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发表时间：
2014-05-28
影响因子：
5.2
通讯作者：
Scheuchl, B.
中科院分区：
文献类型：
--
作者：
Rignot, E.;Mouginot, J.;Scheuchl, B.
我们使用地球遥感（ERS-1/2）卫星雷达干涉测量技术，从1992年到2011年，测量了南极西部阿蒙森海部分冰川的接地线退缩。松岛冰川的中心退缩了31公里，其中大部分退缩发生在2005-2009年，当时冰川从冰原上脱离。思韦茨冰川沿其快速流动核心沿着后退了14公里，沿两侧沿着后退了1至9公里。海恩斯冰川沿其侧翼后退了沿着10公里。史密斯/科勒冰川退缩最多，沿其冰平原沿着35公里，其冰架固定点正在消失。这些快速撤退进行沿着地区的逆行床高程映射在一个高的空间分辨率，使用质量守恒技术，消除残留的模糊性，从以前的映射。在2011年接地线位置的上游，我们没有发现任何主要的河床障碍物，可以阻止冰川进一步退缩并拉下整个流域。
We measure the grounding line retreat of glaciers draining the Amundsen Sea sector of West Antarctica using Earth Remote Sensing (ERS-1/2) satellite radar interferometry from 1992 to 2011. Pine Island Glacier retreated 31 km at its center, with most retreat in 2005-2009 when the glacier ungrounded from its ice plain. Thwaites Glacier retreated 14 km along its fast flow core and 1 to 9 km along the sides. Haynes Glacier retreated 10 km along its flanks. Smith/Kohler glaciers retreated the most, 35 km along its ice plain, and its ice shelf pinning points are vanishing. These rapid retreats proceed along regions of retrograde bed elevation mapped at a high spatial resolution using a mass conservation technique that removes residual ambiguities from prior mappings. Upstream of the 2011 grounding line positions, we find no major bed obstacle that would prevent the glaciers from further retreat and draw down the entire basin.