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Rapid response of Helheim Glacier, southeast Greenland, to early Holocene climate warming

2012; Geological Society of America; Volume: 40; Issue: 5 Linguagem: Inglês

10.1130/g32730.1

1943-2682

Anna L.C. Hughes, Eleanor Rainsley, Tavi Murray, Christopher J. Fogwill, Christoph Schnabel, Sheng Xu,

Climate change and permafrost

Research Article| May 01, 2012 Rapid response of Helheim Glacier, southeast Greenland, to early Holocene climate warming Anna L.C. Hughes; Anna L.C. Hughes * 1GLIMPSE Research Group, Department of Geography, Swansea University, Swansea SA2 8PP, UK *Current address: Department of Earth Science, University of Bergen, Allégaten 41, N-5007 Bergen, Norway; E-mail: anna.hughes@geo.uib.no. Search for other works by this author on: GSW Google Scholar Eleanor Rainsley; Eleanor Rainsley 2Department of Geography, University of Exeter, Exeter EX4 4RJ, UK Search for other works by this author on: GSW Google Scholar Tavi Murray; Tavi Murray 1GLIMPSE Research Group, Department of Geography, Swansea University, Swansea SA2 8PP, UK Search for other works by this author on: GSW Google Scholar Christopher J. Fogwill; Christopher J. Fogwill 2Department of Geography, University of Exeter, Exeter EX4 4RJ, UK3Climate Change Research Centre, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia Search for other works by this author on: GSW Google Scholar Christoph Schnabel; Christoph Schnabel 4Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar Sheng Xu Sheng Xu 4Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Anna L.C. Hughes * 1GLIMPSE Research Group, Department of Geography, Swansea University, Swansea SA2 8PP, UK Eleanor Rainsley 2Department of Geography, University of Exeter, Exeter EX4 4RJ, UK Tavi Murray 1GLIMPSE Research Group, Department of Geography, Swansea University, Swansea SA2 8PP, UK Christopher J. Fogwill 2Department of Geography, University of Exeter, Exeter EX4 4RJ, UK3Climate Change Research Centre, Faculty of Science, University of New South Wales, Sydney, New South Wales, Australia Christoph Schnabel 4Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK Sheng Xu 4Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK *Current address: Department of Earth Science, University of Bergen, Allégaten 41, N-5007 Bergen, Norway; E-mail: anna.hughes@geo.uib.no. Publisher: Geological Society of America Received: 08 Aug 2011 Revision Received: 23 Nov 2011 Accepted: 13 Dec 2011 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (5): 427–430. https://doi.org/10.1130/G32730.1 Article history Received: 08 Aug 2011 Revision Received: 23 Nov 2011 Accepted: 13 Dec 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 Anna L.C. Hughes, Eleanor Rainsley, Tavi Murray, Christopher J. Fogwill, Christoph Schnabel, Sheng Xu; Rapid response of Helheim Glacier, southeast Greenland, to early Holocene climate warming. Geology 2012;; 40 (5): 427–430. doi: https://doi.org/10.1130/G32730.1 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 Recent changes in speed, thinning, and retreat rates of marine-terminating outlet glaciers have raised concerns about the future stability of the Greenland Ice Sheet. Establishing a longer term record of outlet glacier retreat rates is essential to provide a context for present-day observations and to improve and constrain numerical models of outlet glacier behavior. New exposure dating (10Be) of streamlined bedrock surfaces and glacial erratic boulders of Sermilik Fjord, southeast Greenland, the present-day drainage route of Helheim Glacier, documents rapid retreat (∼80 m a−1) of this major marine-terminating outlet glacier at the close of the last glaciation. The glacier front retreated ∼80 km to within 20 km of the present-day (2010) position of Helheim Glacier in <1 ka, ca. 10.8 ± 0.3 ka ago. Retreat followed rapidly rising air temperatures at the start of the Holocene, and at this temporal resolution there is no evidence that fjord geometry influenced glacier behavior. The significant response to climatic amelioration at the end of the last glacial suggests a high sensitivity to abrupt temperature increases, which has major implications for the future stability of present-day Greenlandic outlet glaciers in a warming climate. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.