Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6446788 | Quaternary Science Reviews | 2014 | 32 Pages |
Abstract
Pauses in ice retreat are recorded where there are “bottle necks” in cross-shelf troughs in both embayments. The highest retreat rates presently constrained by radiocarbon dates from sediment cores are found where the grounding line retreated across deep basins on the inner shelf in the Amundsen Sea, which is consistent with the marine ice sheet instability hypothesis. Deglacial ages from the Amundsen Sea Embayment (ASE) and Eltanin Bay (southern Bellingshausen Sea) indicate that the ice sheet had already retreated close to its modern limits by early Holocene time, which suggests that the rapid ice thinning, flow acceleration, and grounding line retreat observed in this sector over recent decades are unusual in the context of the past 10,000 years.
Keywords
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Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Robert D. Larter, John B. Anderson, Alastair G.C. Graham, Karsten Gohl, Claus-Dieter Hillenbrand, Martin Jakobsson, Joanne S. Johnson, Gerhard Kuhn, Frank O. Nitsche, James A. Smith, Alexandra E. Witus, Michael J. Bentley, Julian A. Dowdeswell,