Sedimentological and geophysical investigation of sediment cores from the Amundsen Sea ...

Ice loss from the marine-based, potentially unstable West Antarctic Ice Sheet (WAIS) contributes to current sea-level rise and may raise sea level by up to 3.3 to 5 meters in the future. Over the past few decades, glaciers draining the WAIS into the Amundsen Sea Embayment (ASE) have shown accelerate...

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Bibliographic Details
Main Authors: Hillenbrand, Claus-Dieter, Kuhn, Gerhard, Smith, James A, Gohl, Karsten, Graham, Alastair G C, Larter, Robert D, Klages, Johann Philipp, Downey, Rachel, Moreton, Steven Grahame, Forwick, Matthias, Vaughan, David G
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2013
Subjects:
Box corer
Vibro corer
Trigger corer
Piston corer
Giant box corer
Gravity corer
Gravity corer Kiel type
JR20060109
NBP9902
ANT-XXIII/4
ANT-XXVI/3
James Clark Ross
Nathaniel B. Palmer
Polarstern
Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo
Amundsen Sea
Antarc*
Antarctic
Ice Sheet
Pine Island Bay
Ross Sea
Online Access:https://dx.doi.org/10.1594/pangaea.751493
https://doi.pangaea.de/10.1594/PANGAEA.751493
Description
Summary:Ice loss from the marine-based, potentially unstable West Antarctic Ice Sheet (WAIS) contributes to current sea-level rise and may raise sea level by up to 3.3 to 5 meters in the future. Over the past few decades, glaciers draining the WAIS into the Amundsen Sea Embayment (ASE) have shown accelerated ice flow, rapid thinning and grounding-line retreat. However, the long-term context of this ice-sheet retreat is poorly constrained, limiting our ability to accurately predict future WAIS behaviour. Here we present a new chronology for WAIS retreat from the inner continental shelf of the eastern ASE based on radiocarbon dates from three marine sediment cores. The ages document a retreat of the grounding line to within ~93 km of its modern position before 11.7±0.7 kyr BP (thousand years before present). This early deglaciation is consistent with ages for grounding-line retreat from the western ASE. Our new data demonstrate that, other than in the Ross Sea, WAIS retreat in the ASE has not continued progressively ... : Supplement to: Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Smith, James A; Gohl, Karsten; Graham, Alastair G C; Larter, Robert D; Klages, Johann Philipp; Downey, Rachel; Moreton, Steven Grahame; Forwick, Matthias; Vaughan, David G (2013): Grounding-line retreat of the West Antarctic Ice Sheet from inner Pine Island Bay. Geology, 41(1), 35-38 ...

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