The Antarctic Ice Sheet during the Last Glacial Maximum and its subsequent retreat history: a review
The Antarctic Ice Sheet during the Last Glacial Maximum and its subsequent retreat history: a review
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DOI：
10.1016/s0277-3791(01)00083-x
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发表时间：
2002-01-01
影响因子：
4
通讯作者：
Mosola, AB
中科院分区：
文献类型：
--
作者：
Anderson, JB;Shipp, SS;Mosola, AB
对末次冰期/间冰期循环的研究中出现的大量证据表明，东南极洲和西南极洲的冰盖并没有同时前进和后退。末次盛冰期（LGM）期间，西南极大部分地区的冰盖向外陆架推进。从大陆架撤退开始后不久，LGM和持续到晚全新世。罗斯海和阿蒙森海的南极西部冰盖滑过一个变形的河床，至少在冰川期延长的最后阶段是这样。这意味着在这个时候，冰盖有一个低姿态。接地区楔和较小接地区功能的数量和位置的差异，从槽槽到槽意味着个别西南极冰盖冰流撤退episodically.细节有关的扩张，撤退，和行为的东南极冰盖（EAIS）的更稀疏。出现的情况是，在LGM期间，EAIS没有扩展到大陆架边缘;相反，它在某些地方达到了最大程度的中间大陆架位置，而在其他地区，冰的终点位于其目前的位置附近。在东太平洋岛屿带内，沿沿着地段的撤退时间似乎是历时性的，有些地方发生在末次冰期之前。南极半岛大陆架在末次盛冰期包含了比以前提出的更多的冰，本文提出的结果支持最近发表的冰盖模型，呼吁更大的贡献，融化的冰从南极洲西部，包括南极半岛，冰后期海平面上升。(C)2001爱思唯尔科技有限公司版权所有。
An emerging body of evidence from studies of the last glacial/interglacial cycle suggests that the East and West Antarctic ice sheets have not advanced and retreated in concert. The West Antarctic ice sheet advanced to the outer shelf in most re dons during the Last Glacial Maximum (LGM). The retreat from the shelf commenced shortly after the LGM and continued into the late Holocene. The West Antarctic Ice Sheet in Ross and Amundsen seas slid across a deforming bed, at least during the final phases of extended glaciation. This implies that at this time the ice sheet had a low profile. Differences in the number and locations of grounding-zone wedges and smaller grounding zone features from trough to trough imply that individual West Antarctic Ice Sheet ice streams retreated episodically.Details concerning the expansion, retreat, and behavior of the East Antarctic Ice Sheet (EAIS) are more sparse. The picture emerging is that the EAIS did not expand to the continental shelf edge during the LGM; rather, it achieved a maximum extent of a mid-shelf position in some locations, while in other areas the ice terminus was situated near its present location. The timing of retreat along sectors within the EAIS appears diachronous, and in places occurred prior to the LGM. The Antarctic Peninsula shelf contained considerably more ice during the LGM than previously proposed.The results presented in this paper support more recent published ice-sheet models that call for greater contributions of melting ice from West Antarctica, including the Antarctic Peninsula, to the post-glacial rise in sea level. (C) 2001 Elsevier Science Ltd. All rights reserved.