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A re-evaluation of the Pleistocene behavior of the Scoresby Sund sector of the Greenland Ice Sheet

2013; Geological Society of America; Volume: 41; Issue: 12 Linguagem: Inglês

10.1130/g34784.1

1943-2682

Jan Sverre Laberg, Matthias Forwick, Katrine Husum, Tøve Nielsen,

Landslides and related hazards

Research Article| December 01, 2013 A re-evaluation of the Pleistocene behavior of the Scoresby Sund sector of the Greenland Ice Sheet Jan Sverre Laberg; Jan Sverre Laberg * 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway *E-mail: jan.laberg@uit.no. Search for other works by this author on: GSW Google Scholar Matthias Forwick; Matthias Forwick 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway Search for other works by this author on: GSW Google Scholar Katrine Husum; Katrine Husum 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway Search for other works by this author on: GSW Google Scholar Tove Nielsen Tove Nielsen 2Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark Search for other works by this author on: GSW Google Scholar Author and Article Information Jan Sverre Laberg * 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway Matthias Forwick 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway Katrine Husum 1Department of Geology, University of Tromsø, N-9037 Tromsø, Norway Tove Nielsen 2Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark *E-mail: jan.laberg@uit.no. Publisher: Geological Society of America Received: 30 May 2013 Revision Received: 30 Aug 2013 Accepted: 31 Aug 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (12): 1231–1234. https://doi.org/10.1130/G34784.1 Article history Received: 30 May 2013 Revision Received: 30 Aug 2013 Accepted: 31 Aug 2013 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jan Sverre Laberg, Matthias Forwick, Katrine Husum, Tove Nielsen; A re-evaluation of the Pleistocene behavior of the Scoresby Sund sector of the Greenland Ice Sheet. Geology 2013;; 41 (12): 1231–1234. doi: https://doi.org/10.1130/G34784.1 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 Limited data on the past dynamics of the Greenland Ice Sheet, exceeding the ice-core records, have led to partly contradictory reconstructions. Whereas the Scoresby Sund sector of the Greenland Ice Sheet has been suggested to be stable and not much larger than at present during the peak Pleistocene glaciations, the southeastern sector of the ice sheet has been inferred to be much more dynamic. Here we present seismic data showing that glacigenic debris-flow deposits dominate the younger than ca. 2.58 Ma succession of the Scoresby Sund trough mouth fan on the East Greenland continental margin, suggesting much more frequent expansions of the Greenland Ice Sheet to the shelf break than found previously. From our new observations of the Pleistocene stratigraphy, we revise previous findings and conclude that the Scoresby Sund sector of the Greenland Ice Sheet during the Pleistocene (1) developed in line with other parts of the East Greenland Ice Sheet, and (2) was more dynamic and sensitive to past climatic changes than hitherto realized. This rapid response of the glacier to climate forcing indicates how dynamic is the glacier ice front and what one might expect of the glacier as the influences of climate warming become more pronounced. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.