气候变化领域集成服务门户(CCPortal): Thermal structure and basal sliding parametrisation at Pine Island Glacier

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DOI	10.5194/tc-9-675-2015
	Thermal structure and basal sliding parametrisation at Pine Island Glacier - A 3-D full-Stokes model study
	Wilkens N.; Behrens J.; Kleiner T.; Rippin D.; Rückamp M.; Humbert A.
发表日期	2015
ISSN	19940416
卷号	9 期号:2
英文摘要	Pine Island Glacier is one of the fastest changing glaciers of the Antarctic Ice Sheet and therefore of scientific interest. The glacier holds enough ice to raise the global sea level significantly (∼ 0.5 m) when fully melted. The question addressed by numerous modelling studies of the glacier focuses on whether the observed changes are a start of an uncontrolled and accelerating retreat. The movement of the glacier is, in the fast-flowing areas, dominated by basal motion. In modelling studies the parametrisation of the basal motion is therefore crucial. Inversion methods are commonly applied to reproduce the complex surface flow structure of Pine Island Glacier by using information of the observed surface velocity field to constrain, among other things, basal sliding. We introduce two different approaches of combining a physical parameter, the basal roughness, with basal sliding parametrisations. This way basal sliding is again connected closer to its original formulation. We show that the basal roughness is an important and helpful parameter to consider and that many features of the flow structure can be reproduced with these approaches. © Author(s) 2015.
学科领域	glacier flow; parameterization; sea level; surface roughness; thermal structure; three-dimensional modeling; Antarctic Ice Sheet; Antarctica; Pine Island Glacier; West Antarctica
语种	英语
scopus关键词	glacier flow; parameterization; sea level; surface roughness; thermal structure; three-dimensional modeling; Antarctic Ice Sheet; Antarctica; Pine Island Glacier; West Antarctica
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/119920
作者单位	Institute for Geophysics, University of Hamburg, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Numerical Methods in Geosciences, University of Hamburg, Germany; Environment Department, University of York, Heslington, United Kingdom; Department of Geosciences, University of Bremen, Germany
推荐引用方式 GB/T 7714	Wilkens N.,Behrens J.,Kleiner T.,et al. Thermal structure and basal sliding parametrisation at Pine Island Glacier - A 3-D full-Stokes model study[J],2015,9(2).
APA	Wilkens N.,Behrens J.,Kleiner T.,Rippin D.,Rückamp M.,&Humbert A..(2015).Thermal structure and basal sliding parametrisation at Pine Island Glacier - A 3-D full-Stokes model study.Cryosphere,9(2).
MLA	Wilkens N.,et al."Thermal structure and basal sliding parametrisation at Pine Island Glacier - A 3-D full-Stokes model study".Cryosphere 9.2(2015).