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Resolution of ice streams and outlet glaciers in large-scale simulations of the Greenland ice sheet

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タイトル: Resolution of ice streams and outlet glaciers in large-scale simulations of the Greenland ice sheet
著者: Greve, Ralf 著作を一覧する
Herzfeld, Ute C. 著作を一覧する
発行日: 2013年 7月
出版者: Int Glaciol Soc
誌名: Annals of Glaciology
巻: 54
号: 63
開始ページ: 209
終了ページ: 220
出版社 DOI: 10.3189/2013AoG63A085
抄録: The dynamic/thermodynamic shallow-ice model SICOPOLIS is applied to the Greenland ice sheet. Paleoclimatic spin-ups from 125 ka BP until today, as well as future-climate experiments 500 years into the future, are carried out with three different grid spacings, namely 20,10 and 5 km. The scenarios are a subset of those specified by the SeaRISE (Sea-level Response to Ice Sheet Evolution) community effort. The bed topography includes improved troughs for Jakobshavn Isbrae, Helheim, Kangerdlugssuaq and Petermann glaciers, processed by an algorithm that preserves shape, orientation and continuity of the troughs on the 5 km scale. Comparison of simulated and observed present-day surface velocities shows that these ice streams and outlet glaciers are resolved with different accuracies, ranging from poor (20 km grid) to reasonably good (5 km grid). In the future-climate experiments, the simulated absolute ice volumes depend significantly on the resolution, while the sensitivities (ice volumes relative to the constant-climate control run) vary only by a few centimeters of sea-level equivalent.
Rights: Copyright (c) 2013 International Glaciological Society
Relation (URI): http://www.igsoc.org/
資料タイプ: article
URI: http://hdl.handle.net/2115/53424
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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