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Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum

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タイトル: Simulation of fast-flow features of the Fennoscandian ice sheet during the Last Glacial Maximum
著者: Forsström, Pirjo-Leena 著作を一覧する
Sallasmaa, Olli 著作を一覧する
Greve, Ralf 著作を一覧する
Zwinger, Thomas 著作を一覧する
キーワード: Fennoscandian ice sheet
Scandinavian ice sheet
Last Glacial Maximum
Fast flow
Ice stream
発行日: 2003年 6月 1日
出版者: International Glaciological Society
誌名: Annals of Glaciology
巻: 37
号: 1
開始ページ: 383
終了ページ: 389
出版社 DOI: 10.3189/172756403781815500
抄録: In order to reconstruct the palaeoglaciation in Fennoscandia and northern Asia during the late-Weichselian ice-age phase, simulations with the dynamic and thermodynamic ice-sheet model SICOPOLIS are carried out. Our focus is on the Last Glacial Maximum (LGM) around 20 kyr BP. Climate forcing is based on mean annual surface temperature and precipitation derived from present data and Palaeoclimatic Modelling Intercomparison Project (PMIP) UKMO21 results for the LGM. These distributions are interpolated via a glacial index defined by the Greenland Icecore Project (GRIP) δ18 O record. The extent of the Scandinavian and the Barents ice sheets is reproduced in good agreement with the Quaternary Environments of the Eurasian North (QUEEN) reconstruction, but the Kara Sea and Taymyr Peninsula areas are excessively glaciated. The fast-flow regions derived from the simulations, which are generally connected to regions with a temperate base and temperate ice above, are compared to hypothesized palaeoice-stream locations, especially in the Norwegian Channel and the Baltic area. In the Norwegian Channel, temperate basal conditions with temperate ice above prevail and favour fast flow. In the Baltic area, ice-sheet advance is generally accompanied by slow ice velocities (<200 m a-1). Some temporary fast-flow features occur due to transitional temperate-base conditions, and higher velocities arise in retreat phases.
Rights: © 2003 International Glaciological Society
Relation (URI):
資料タイプ: article
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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