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Simulation of the Eurasian ice sheet dynamics during the last glaciation

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タイトル: Simulation of the Eurasian ice sheet dynamics during the last glaciation
著者: Forsström, Pirjo-Leena 著作を一覧する
Greve, Ralf 著作を一覧する
キーワード: LGM reconstruction
Ice sheet dynamics
Icebergs
Freshwater
Ice streams
発行日: 2004年 7月
出版者: Elsevier
誌名: Global and Planetary Change
巻: 42
号: 1-4
開始ページ: 59
終了ページ: 81
出版社 DOI: 10.1016/j.gloplacha.2003.11.003
抄録: 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.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/34753
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: Greve Ralf

 

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