DOI: 10.5194/tc-9-675-2015
Scopus记录号: 2-s2.0-84928035018
论文题名: Thermal structure and basal sliding parametrisation at Pine Island Glacier - A 3-D full-Stokes model study
作者: Wilkens N ; , Behrens J ; , Kleiner T ; , Rippin D ; , Rückamp M ; , Humbert A
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 2 起始页码: 675
结束页码: 690
语种: 英语
英文关键词: glacier flow
; parameterization
; sea level
; surface roughness
; thermal structure
; three-dimensional modeling
; Antarctic Ice Sheet
; Antarctica
; Pine Island Glacier
; West Antarctica
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75318
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: 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
Recommended Citation:
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]. Cryosphere,2015-01-01,9(2)