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Deglacial history of the West Antarctic ice sheet in the Weddell Sea embayment; constraints on past ice volume change

Michael J. Bentley, Christopher J. Fogwill, Anne M. Le Brocq, Alun L. Hubbard, David E. Sugden, Tibor J. Dunai and Stewart P. H. T. Freeman
Deglacial history of the West Antarctic ice sheet in the Weddell Sea embayment; constraints on past ice volume change
Geology (Boulder) (May 2010) 38 (5): 411-414

Abstract

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 approximately 14,200 yr ago.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 38
Serial Issue: 5
Title: Deglacial history of the West Antarctic ice sheet in the Weddell Sea embayment; constraints on past ice volume change
Affiliation: University of Durham, Department of Geography, Durham, United Kingdom
Pages: 411-414
Published: 201005
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 31
Accession Number: 2010-045878
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2010114
Illustration Description: illus. incl. sketch maps
S80°30'00" - S77°30'00", W87°00'00" - W80°00'00"
Secondary Affiliation: University of Exeter, GBR, United KingdomAberystwyth University, GBR, United KingdomUniversity of Edinburgh, GBR, United KingdomScottish Universities Environmental Research Centre, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201025
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