globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-8-1239-2014
Scopus记录号: 2-s2.0-84904625412
论文题名:
Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model
作者: Leguy G; R; , Asay-Davis X; S; , Lipscomb W; H
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期:4
起始页码: 1239
结束页码: 1259
语种: 英语
英文摘要: Ice sheets and ice shelves are linked by the transition zone, the region where flow dominated by vertical shear stress makes a transition to flow dominated by extensional stress. Adequate resolution of the transition zone is necessary for numerically accurate ice sheet-ice shelf simulations. The required resolution depends on how the basal physics is parameterized. We propose a new, simple parameterization of the effective pressure near the grounding line, combined with an existing friction law linking effective pressure to basal stress and sliding, in a one-dimensional, fixed-grid, vertically integrated model. This parameterization represents connectivity between the basal hydrological system and the ocean in the transition zone. Our model produces a smooth transition between finite basal friction in the ice sheet and zero basal friction in the ice shelf. In a set of experiments based on the Marine Ice Sheet Model Intercomparison Project (MISMIP), we show that with a smoother basal shear stress, the model yields accurate steady-state results at a fixed-grid resolution of ~1 km. © Author(s) 2014.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74821
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87501, United States; Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY 10012-1185, United States; Potsdam Institute for Climate Impact Research, Telegraphenberg A 31, 14473 Potsdam, Germany

Recommended Citation:
Leguy G,R,, Asay-Davis X,et al. Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model[J]. Cryosphere,2014-01-01,8(4)
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