Grounding-line retreat of the West Antarctic Ice Sheet from inner Pine Island Bay
2012; Geological Society of America; Volume: 41; Issue: 1 Linguagem: Inglês
10.1130/g33469.1
ISSN1943-2682
AutoresClaus‐Dieter Hillenbrand, Gerhard Kühn, James A. Smith, Karsten Gohl, Alastair G C Graham, Robert D Larter, Johann Philipp Klages, Rachel Downey, Steven Grahame Moreton, Matthias Forwick, David G. Vaughan,
Tópico(s)Polar Research and Ecology
ResumoResearch Article| January 01, 2013 Grounding-line retreat of the West Antarctic Ice Sheet from inner Pine Island Bay Claus-Dieter Hillenbrand; Claus-Dieter Hillenbrand * 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK *E-mail: hilc@bas.ac.uk. Search for other works by this author on: GSW Google Scholar Gerhard Kuhn; Gerhard Kuhn 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar James A. Smith; James A. Smith 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Search for other works by this author on: GSW Google Scholar Karsten Gohl; Karsten Gohl 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar Alastair G.C. Graham; Alastair G.C. Graham 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Search for other works by this author on: GSW Google Scholar Robert D. Larter; Robert D. Larter 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Search for other works by this author on: GSW Google Scholar Johann P. Klages; Johann P. Klages 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar Rachel Downey; Rachel Downey 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Search for other works by this author on: GSW Google Scholar Steven G. Moreton; Steven G. Moreton 3NERC Radiocarbon Laboratory (Environment), Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar Matthias Forwick; Matthias Forwick 4University of Tromsø, Department of Geology, N-9037 Tromsø, Norway Search for other works by this author on: GSW Google Scholar David G. Vaughan David G. Vaughan 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Claus-Dieter Hillenbrand * 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Gerhard Kuhn 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany James A. Smith 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Karsten Gohl 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Alastair G.C. Graham 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Robert D. Larter 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Johann P. Klages 2Alfred Wegener Institute for Polar and Marine Research (AWI), Helmholtz Association, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Rachel Downey 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK Steven G. Moreton 3NERC Radiocarbon Laboratory (Environment), Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride G75 0QF, UK Matthias Forwick 4University of Tromsø, Department of Geology, N-9037 Tromsø, Norway David G. Vaughan 1British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK *E-mail: hilc@bas.ac.uk. Publisher: Geological Society of America Received: 29 Mar 2012 Revision Received: 03 Jul 2012 Accepted: 03 Jul 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2013) 41 (1): 35–38. https://doi.org/10.1130/G33469.1 Article history Received: 29 Mar 2012 Revision Received: 03 Jul 2012 Accepted: 03 Jul 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Claus-Dieter Hillenbrand, Gerhard Kuhn, James A. Smith, Karsten Gohl, Alastair G.C. Graham, Robert D. Larter, Johann P. Klages, Rachel Downey, Steven G. Moreton, Matthias Forwick, David G. Vaughan; Grounding-line retreat of the West Antarctic Ice Sheet from inner Pine Island Bay. Geology 2013;; 41 (1): 35–38. doi: https://doi.org/10.1130/G33469.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract 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 ≤3.3 m or even ≤5 m 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 fast retreat of the grounding line (GL). However, the long-term context of this ice loss is poorly constrained, limiting our ability to accurately predict future WAIS behavior. 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 GL to within ∼100 km of its modern position before ca. 10,000 calibrated (cal.) yr B.P. This early deglaciation is consistent with ages for GL retreat from the western ASE. Our new data demonstrate that, in contrast to the Ross Sea, WAIS retreat from the ASE shelf was largely complete by the start of the Holocene. Our results further suggest either slow GL retreat from the inner ASE shelf throughout the Holocene, or that any episodes of fast GL retreat must have been short-lived. Thus, today's rapid retreat may be exceptional during the Holocene and may originate in recent changes in regional climate, ocean circulation, or ice-sheet dynamics. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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