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Results from the Ice-Sheet Model Intercomparison Project–Heinrich Event INtercOmparison (ISMIP HEINO)

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タイトル: Results from the Ice-Sheet Model Intercomparison Project–Heinrich Event INtercOmparison (ISMIP HEINO)
著者: Calov, Reinhard 著作を一覧する
Greve, Ralf 著作を一覧する
Abe-Ouchi, Ayako 著作を一覧する
Bueler, Ed 著作を一覧する
Huybrechts, Philippe 著作を一覧する
Johnson, Jesse V. 著作を一覧する
Pattyn, Frank 著作を一覧する
Pollard, David 著作を一覧する
Ritz, Catherine 著作を一覧する
Saito, Fuyuki 著作を一覧する
Tarasov, Lev 著作を一覧する
キーワード: Ice sheet
Model intercomparison
ISMIP
Heinrich event
Instability
発行日: 2010年 8月 1日
出版者: International Glaciological Society
誌名: Journal of Glaciology
巻: 56
号: 197
開始ページ: 371
終了ページ: 383
出版社 DOI: 10.3189/002214310792447789
抄録: Results from the Heinrich Event INtercOmparison (HEINO) topic of the Ice-Sheet Model Intercomparison Project (ISMIP) are presented. ISMIP HEINO was designed to explore internal largescale ice-sheet instabilities in different contemporary ice-sheet models. These instabilities are of interest because they are a possible cause of Heinrich events. A simplified geometry experiment reproduces the main characteristics of the Laurentide ice sheet, including the sedimented region over Hudson Bay and Hudson Strait. The model experiments include a standard run plus seven variations. Nine dynamic/thermodynamic ice-sheet models were investigated; one of these models contains a combination of the shallow-shelf (SSA) and shallow-ice approximation (SIA), while the remaining eight models are of SIA type only. Seven models, including the SIA–SSA model, exhibit oscillatory surges with a period of ∼1000 years for a broad range of parameters, while two models remain in a permanent state of streaming for most parameter settings. In a number of models, the oscillations disappear for high surface temperatures, strong snowfall and small sediment sliding parameters. In turn, low surface temperatures and low snowfall are favourable for the ice-surge cycles. We conclude that further improvement of ice-sheet models is crucial for adequate, robust simulations of cyclic large-scale instabilities.
Rights: © 2010 International Glaciological Society
Relation (URI): http://www.igsoc.org/
資料タイプ: article
URI: http://hdl.handle.net/2115/44808
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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