Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change

被引：121

作者：

Bentley, Michael J. ^{[1
]}

Fogwill, Christopher J. ^{[2
]}

Le Brocq, Anne M. ^{[1
]}

Hubbard, Alun L. ^{[3
]}

Sugden, David E. ^{[4
]}

Dunai, Tibor J. ^{[4
]}

Freeman, Stewart P. H. T. ^{[5
]}

机构：

[1] Univ Durham, Dept Geog, Durham DH1 3LE, England

[2] Univ Exeter, Sch Geog, Exeter EX4 4RJ, Devon, England

[3] Aberystwyth Univ, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Ceredigion, Wales

[4] Univ Edinburgh, Sch Geosci, Edinburgh EH9 8XP, Midlothian, Scotland

[5] Scottish Univ Environm Res Ctr, E Kilbride G75 0QF, Lanark, Scotland

来源：

GEOLOGY | 2010年 / 38卷 / 05期

基金：

英国自然环境研究理事会;

关键词：

LAST GLACIAL MAXIMUM; MELTWATER-PULSE-IA; EAST ANTARCTICA; EXPOSURE AGES; LEVEL; RETREAT; THICKNESS; CLIMATE; REGION; NORTH;

D O I：

10.1130/G30754.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The retreat history of the West Antarctic Ice Sheet (WAIS) since the Last Glacial Maximum is important for understanding the process of rapid deglaciation, constraining models that seek to predict the future trajectory of the ice sheet, and for estimating rates of sea-level change. Here we report new glacial geologic data from the southwestern Weddell Sea embayment that demonstrate that this part of the WAIS was thinner than previously suggested, and that there was progressive thinning of the ice sheet by 230-480 m since ca. 15 ka. We use geomorphological data and a numerical ice sheet model to reconstruct the ice sheet in the Weddell Sea at the Last Glacial Maximum. The volume of this ice would have added between 1.4 and 2.0 m to postglacial sea-level rise and would not have been sufficient to contribute significantly to meltwater pulse 1A, a rapid rise in sea level similar to 14,200 yr ago.

引用

页码：411 / 414

页数：4

共 31 条

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