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Comparison of thermodynamics solvers in the polythermal ice sheet model SICOPOLIS

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タイトル: Comparison of thermodynamics solvers in the polythermal ice sheet model SICOPOLIS
著者: Greve, Ralf 著作を一覧する
Blatter, Heinz 著作を一覧する
キーワード: Ice sheet
Thermodynamics
Polythermal ice
Enthalpy method
Modeling
発行日: 2016年 1月 2日
出版者: Elsevier
誌名: Polar Science
巻: 10
号: 1
開始ページ: 11
終了ページ: 23
出版社 DOI: 10.1016/j.polar.2015.12.004
抄録: In order to model the thermal structure of polythermal ice sheets accurately, energy-conserving schemes and correct tracking of the coldetemperate transition surface (CTS) are necessary. We compare four different thermodynamics solvers in the ice sheet model SICOPOLIS. Two exist already, namely a twolayer polythermal scheme (POLY) and a single-phase cold-ice scheme (COLD), while the other two are newly-implemented, one-layer enthalpy schemes, namely a conventional scheme (ENTC) and a meltingCTS scheme (ENTM). The comparison uses scenarios of the EISMINT Phase 2 Simplified Geometry Experiments (Payne et al., 2000, J. Glaciol. 46, 227-238). The POLY scheme is used as a reference against which the performance of the other schemes is tested. Both the COLD scheme and the ENTC scheme fail to produce a continuous temperature gradient across the CTS, which is explicitly enforced by the ENTM scheme. ENTM is more precise than ENTC for determining the position of the CTS, while the performance of both schemes is good for the temperature/water-content profiles in the entire ice column. Therefore, the one-layer enthalpy schemes ENTC and ENTM are viable, easier implementable alternatives to the POLY scheme with its need to handle two different numerical domains for cold and temperate ice. (C) 2016 Elsevier B.V. and NIPR. All rights reserved.
Rights: ©2016, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/68069
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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