scholarly journals Melting History of the Antarctic Ice Sheet Since the Last Glacial Maximum Based on the Analysis of Sediment Cores around the Antarctic Peninsula, Southern Ocean

2007 ◽  
Vol 46 (2) ◽  
pp. 103-117 ◽  
Author(s):  
Masahiro Noumi ◽  
Yusuke Yokoyama ◽  
Hideki Miura ◽  
Naohiko Ohkouchi
Keyword(s):  
Southern Ocean ◽  
Last Glacial Maximum ◽  
Antarctic Peninsula ◽  
Sediment Cores ◽  
Antarctic Ice Sheet ◽  
Last Glacial ◽  
History Of ◽  
The Antarctic ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Glacial and marine geological evidence for the ice sheet configuration in the Weddell Sea–Antarctic Peninsula region during the Last Glacial Maximum

1998 ◽  
Vol 10 (3) ◽  
pp. 309-325 ◽  
Author(s):  
Michael J. Bentley ◽  
John B. Anderson
Keyword(s):  
Last Glacial Maximum ◽  
Antarctic Peninsula ◽  
Ice Sheet ◽  
Weddell Sea ◽  
Antarctic Ice Sheet ◽  
Geological Evidence ◽  
Last Glacial ◽  
The Antarctic ◽  
The Last Glacial Maximum ◽  
The Last Glacial

The Weddell Sea region arguably represents the largest unknown in quantifying the Antarctic contribution to the global water balance following the Last Glacial Maximum (LGM). This paper reviews the available onshore and offshore geological evidence constraining the volume of formerly expanded ice in the Weddell Sea embayment, focusing on the West Antarctic Ice Sheet (WAIS) and provides a preliminary reconstruction of the WAIS during the LGM. Dating control is generally poor and so our WAIS reconstruction is based on the assumption that the evidence of most recent ice sheet expansion dates to the LGM. Our reconstruction is intended to provide initial constraints with which glaciological models can be compared and shows grounded ice extent, flow directions, and ice surface elevations. Both marine and terrestrial geological evidence imply a substantial expansion of ice in the Weddell Sea embayment. Marine evidence shows that ice sheets were grounded in Crary Trough in the southern Weddell Sea and on the Antarctic Peninsula continental shelf during the LGM. Inland, the ice thickened by between 400 m (Ellsworth and Palmer Land) and 1900 m (Ellsworth Mountains). Ice core evidence suggests that the interior of the ice sheet remained the same or even thinned relative to present. The main unknowns now concern the exact location of the grounding line on some sectors of the shelf and the timing of ice sheet grounding and retreat. The limited radiocarbon data that exist on the eastern shelf indicates that the East Antarctic Ice Sheet retreated from the shelf prior to the LGM.

scholarly journals Reconstruction of ice-sheet changes in the Antarctic Peninsula since the Last Glacial Maximum

2014 ◽  
Vol 100 ◽  
pp. 87-110 ◽  
Author(s):  
Colm Ó Cofaigh ◽  
Bethan J. Davies ◽  
Stephen J. Livingstone ◽  
James A. Smith ◽  
Joanne S. Johnson ◽  
...  
Keyword(s):  
Last Glacial Maximum ◽  
Antarctic Peninsula ◽  
Ice Sheet ◽  
Glacial Maximum ◽  
Last Glacial ◽  
The Antarctic ◽  
The Last Glacial Maximum ◽  
The Last Glacial

scholarly journals Retreat history of the East Antarctic Ice Sheet since the Last Glacial Maximum

2014 ◽  
Vol 100 ◽  
pp. 10-30 ◽  
Author(s):  
Andrew N. Mackintosh ◽  
Elie Verleyen ◽  
Philip E. O'Brien ◽  
Duanne A. White ◽  
R. Selwyn Jones ◽  
...  
Keyword(s):  
Last Glacial Maximum ◽  
Ice Sheet ◽  
Glacial Maximum ◽  
Antarctic Ice Sheet ◽  
Last Glacial ◽  
History Of ◽  
The Last Glacial Maximum ◽  
The Last Glacial ◽  
East Antarctic Ice Sheet

A model study of the effect of climate and sea-level change on the evolution of the Antarctic Ice Sheet from the Last Glacial Maximum to 2100

2014 ◽  
Vol 45 (3-4) ◽  
pp. 837-851 ◽  
Author(s):  
M. N. A. Maris ◽  
J. M. van Wessem ◽  
W. J. van de Berg ◽  
B. de Boer ◽  
J. Oerlemans
Keyword(s):  
Sea Level ◽  
Last Glacial Maximum ◽  
Sea Level Change ◽  
Antarctic Ice Sheet ◽  
Last Glacial ◽  
Level Change ◽  
Model Study ◽  
The Antarctic ◽  
The Last Glacial Maximum ◽  
The Last Glacial

The deglacial history of NW Alexander Island, Antarctica, from surface exposure dating

2012 ◽  
Vol 77 (2) ◽  
pp. 273-280 ◽  
Author(s):  
Joanne S. Johnson ◽  
Jeremy D. Everest ◽  
Philip T. Leat ◽  
Nicholas R. Golledge ◽  
Dylan H. Rood ◽  
...  
Keyword(s):  
Last Glacial Maximum ◽  
Antarctic Peninsula ◽  
Ice Sheet ◽  
Glacial Maximum ◽  
Ice Shelf ◽  
Last Glacial ◽  
Ice Cap ◽  
The Antarctic ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Recent changes along the margins of the Antarctic Peninsula, such as the collapse of the Wilkins Ice Shelf, have highlighted the effects of climatic warming on the Antarctic Peninsula Ice Sheet (APIS). However, such changes must be viewed in a long-term (millennial-scale) context if we are to understand their significance for future stability of the Antarctic ice sheets. To address this, we present nine new cosmogenic 10Be exposure ages from sites on NW Alexander Island and Rothschild Island (adjacent to the Wilkins Ice Shelf) that provide constraints on the timing of thinning of the Alexander Island ice cap since the last glacial maximum. All but one of the 10Be ages are in the range 10.2–21.7 ka, showing a general trend of progressive ice-sheet thinning since at least 22 ka until 10 ka. The data also provide a minimum estimate (490 m) for ice-cap thickness on NW Alexander Island at the last glacial maximum. Cosmogenic 3He ages from a rare occurrence of mantle xenoliths on Rothschild Island yield variable ages up to 46 ka, probably reflecting exhumation by periglacial processes.

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