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Simulation of the Eurasian ice sheet dynamics during the last glaciation

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Title: Simulation of the Eurasian ice sheet dynamics during the last glaciation
Authors: Forsström, Pirjo-Leena Browse this author
Greve, Ralf Browse this author →KAKEN DB
Keywords: LGM reconstruction
Ice sheet dynamics
Ice streams
Issue Date: Jul-2004
Publisher: Elsevier
Journal Title: Global and Planetary Change
Volume: 42
Issue: 1-4
Start Page: 59
End Page: 81
Publisher DOI: 10.1016/j.gloplacha.2003.11.003
Abstract: The Eurasian Weichselian glaciation is studied with the SICOPOLIS ice-sheet model and UKMO PMIP climate anomaly forcings. A set of sensitivity tests are completed, including runs in cold-ice mode, different positive-degree-day (PDD) factors and modified climatic data-sets. The model set-up with present-day climatology modified by a glacial index brings forth an areally correct Last Glacial Maximum (LGM) extent in the western areas, but the ice-sheet volume is too small compared to reconstructions from rebound rates. Applying modified climate data results in similar extent as indicated by the Quaternary Environment of the Eurasian North (QUEEN) Late Weichselian ice-sheet reconstruction. The simulation results display freshwater fluxes from melting and calving in phase with Heinrich events H3 at 27, H2 at 22, and H1 at 14 ka ago. These peaks correspond to fast flow areas, with main activity at 27 and 22 ka ago in the Nordic Channel area and later in the Bear Island and Storfjorden region. The activity of these areas seems to be shifting from south to north from LGM to the Holocene. The freshwater pulse at 19–18.5 ka could correspond to Dansgaard-Oeschger oscillation, as well as ice volume flux peaks around 18–17 ka ago on the western margin of the ice sheet.
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Greve Ralf

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