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

Anne M. Le Brocq; Alun L. Hubbard; Christopher J. Fogwill; Tibor J. Dunai; David E. Sugden; Stewart P. H. T. Freeman; Michael J. Bentley

doi:10.1130/G30754.1

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

Anne M. Le Brocq, Alun L. Hubbard, Christopher J. Fogwill, Tibor J. Dunai, David E. Sugden, Stewart P. H. T. Freeman, Michael J. Bentley

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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.

Iaith wreiddiol	Saesneg
Tudalennau (o-i)	411-414
Nifer y tudalennau	4
Cyfnodolyn	Geology
Cyfrol	38
Rhif cyhoeddi	5
Dynodwyr Gwrthrych Digidol (DOIs)	https://doi.org/10.1130/G30754.1
Statws	Cyhoeddwyd - Mai 2010

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10.1130/G30754.1

http://hdl.handle.net/2160/6796

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@article{855fd03b52eb4a9fa2b348970cfffb66,

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

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 similar to 14,200 yr ago.",

author = "{Le Brocq}, {Anne M.} and Hubbard, {Alun L.} and Fogwill, {Christopher J.} and Dunai, {Tibor J.} and Sugden, {David E.} and Freeman, {Stewart P. H. T.} and Bentley, {Michael J.}",

note = "Bentley, M. J., Fogwill, C. J., Le Brocq, A. M., Hubbard, A. L., Sugden, D. E., Dunai, T. J., Freeman, S. P. H. T. (2010). Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change. Geology, 38(5), 411-414. Sponsorship: Natural Environment Research Council Antarctic Funding Initiative; University of Canterbury, New Zealand",

year = "2010",

month = may,

doi = "10.1130/G30754.1",

language = "English",

volume = "38",

pages = "411--414",

journal = "Geology",

issn = "1943-2682",

publisher = "Geological Society of America",

number = "5",

}

TY - JOUR

T1 - Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change

AU - Le Brocq, Anne M.

AU - Hubbard, Alun L.

AU - Fogwill, Christopher J.

AU - Dunai, Tibor J.

AU - Sugden, David E.

AU - Freeman, Stewart P. H. T.

AU - Bentley, Michael J.

N1 - Bentley, M. J., Fogwill, C. J., Le Brocq, A. M., Hubbard, A. L., Sugden, D. E., Dunai, T. J., Freeman, S. P. H. T. (2010). Deglacial history of the West Antarctic Ice Sheet in the Weddell Sea embayment: Constraints on past ice volume change. Geology, 38(5), 411-414. Sponsorship: Natural Environment Research Council Antarctic Funding Initiative; University of Canterbury, New Zealand

PY - 2010/5

Y1 - 2010/5

N2 - 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.

AB - 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.

U2 - 10.1130/G30754.1

DO - 10.1130/G30754.1

M3 - Article

SN - 1943-2682

VL - 38

SP - 411

EP - 414

JO - Geology

JF - Geology

IS - 5

ER -

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

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