气候变化领域集成服务门户(CCPortal): Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model

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DOI	10.5194/tc-8-1239-2014
	Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model
	Leguy G.R.; Asay-Davis X.S.; Lipscomb W.H.
发表日期	2014
ISSN	19940416
卷号	8 期号:4
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.
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120087
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
推荐引用方式 GB/T 7714	Leguy G.R.,Asay-Davis X.S.,Lipscomb W.H.. Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model[J],2014,8(4).
APA	Leguy G.R.,Asay-Davis X.S.,&Lipscomb W.H..(2014).Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model.Cryosphere,8(4).
MLA	Leguy G.R.,et al."Parameterization of basal friction near grounding lines in a one-dimensional ice sheet model".Cryosphere 8.4(2014).