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Holocene stability of the Amundsen-Weddell ice divide, West Antarctica

2011; Geological Society of America; Volume: 39; Issue: 10 Linguagem: Inglês

10.1130/g31920.1

1943-2682

Neil Ross, Martín J. Siegert, John Woodward, Andrew M. Smith, Hugh F. J. Corr, Michael J. Bentley, Richard C. A. Hindmarsh, Edward C. King, Andrés Rivera,

Geology and Paleoclimatology Research

Research Article| October 01, 2011 Holocene stability of the Amundsen-Weddell ice divide, West Antarctica N. Ross; N. Ross 1School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK Search for other works by this author on: GSW Google Scholar M.J. Siegert; M.J. Siegert 1School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK Search for other works by this author on: GSW Google Scholar J. Woodward; J. Woodward 2Geography and Environment, School of Built and Natural Environment, Northumbria University, Ellison Building D Block, Ellison Place, Newcastle-upon-Tyne NE1 8ST, UK Search for other works by this author on: GSW Google Scholar A.M. Smith; A.M. Smith 3British 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 H.F.J. Corr; H.F.J. Corr 3British 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 M.J. Bentley; M.J. Bentley 4Department of Geography, Durham University, Science Laboratories, South Road, Durham DH1 3LE, UK Search for other works by this author on: GSW Google Scholar R.C.A. Hindmarsh; R.C.A. Hindmarsh 3British 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 E.C. King; E.C. King 3British 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 A. Rivera A. Rivera 5Centro de Estudios Científicos, Avenida Arturo Prat 514, Casilla 1469, Valdivia, Chile Search for other works by this author on: GSW Google Scholar Author and Article Information N. Ross 1School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK M.J. Siegert 1School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK J. Woodward 2Geography and Environment, School of Built and Natural Environment, Northumbria University, Ellison Building D Block, Ellison Place, Newcastle-upon-Tyne NE1 8ST, UK A.M. Smith 3British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK H.F.J. Corr 3British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK M.J. Bentley 4Department of Geography, Durham University, Science Laboratories, South Road, Durham DH1 3LE, UK R.C.A. Hindmarsh 3British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK E.C. King 3British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK A. Rivera 5Centro de Estudios Científicos, Avenida Arturo Prat 514, Casilla 1469, Valdivia, Chile Publisher: Geological Society of America Received: 12 Nov 2010 Revision Received: 03 May 2011 Accepted: 10 May 2011 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (10): 935–938. https://doi.org/10.1130/G31920.1 Article history Received: 12 Nov 2010 Revision Received: 03 May 2011 Accepted: 10 May 2011 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation N. Ross, M.J. Siegert, J. Woodward, A.M. Smith, H.F.J. Corr, M.J. Bentley, R.C.A. Hindmarsh, E.C. King, A. Rivera; Holocene stability of the Amundsen-Weddell ice divide, West Antarctica. Geology 2011;; 39 (10): 935–938. doi: https://doi.org/10.1130/G31920.1 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 We analyze Holocene ice flow using global positioning system and radio-echo sounding data acquired near the Amundsen-Weddell ice divide, between Pine Island Glacier and the Institute Ice Stream, West Antarctica. The data show that this part of the West Antarctic Ice Sheet (WAIS) has maintained a stable ice flow regime and ice divide position for ∼7000 yr. Independent glacial geological data, in support of this assertion, suggest that the interior of the WAIS west of the Ellsworth Mountains has thinned by only a few hundred meters since the Last Glacial Maximum (LGM) and that the position of the ice divide may be recurrent over longer (more than 20 k.y., perhaps pre-Quaternary) time scales. We suggest that basal topography constrains ice flow in this sector of the WAIS, making the ice divide relatively insensitive to perturbations around the margins of the ice sheet compared with other ice divides. Large-scale forcing measured elsewhere in the WAIS as major reorganizations of the ice sheet surface and flowline pattern may be manifested only in simple vertical changes of the Amundsen-Weddell interior. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.