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DOI | 10.5194/tc-12-2637-2018 |
Basal friction of Fleming Glacier, Antarctica -Part 1: Sensitivity of inversion to temperature and bedrock uncertainty | |
Zhao C.; Gladstone R.M.; Warner R.C.; King M.A.; Zwinger T.; Morlighem M. | |
发表日期 | 2018 |
ISSN | 19940416 |
卷号 | 12期号:8 |
英文摘要 | Many glaciers in the Antarctic Peninsula are now rapidly losing mass. Understanding of the dynamics of these fast-flowing glaciers, and their potential future behaviour, can be improved through ice sheet modelling studies. Inverse methods are commonly used in ice sheet models to infer the spatial distribution of a basal friction coefficient, which has a large effect on the basal velocity and ice deformation. Here we use the full-Stokes Elmer/Ice model to simulate the Wordie Ice Shelf-Fleming Glacier system in the southern Antarctic Peninsula. With an inverse method, we infer the pattern of the basal friction coefficient from surface velocities observed in 2008. We propose a multi-cycle spin-up scheme to reduce the influence of the assumed initial englacial temperature field on the final inversion. This is particularly important for glaciers like the Fleming Glacier, which have areas of strongly temperature-dependent deformational flow in the fast-flowing regions. Sensitivity tests using various bed elevation datasets, ice front positions and boundary conditions demonstrate the importance of high-accuracy ice thickness/bed geometry data and precise location of the ice front boundary. . © Author(s) 2018. |
学科领域 | bedrock; bottom friction; boundary condition; glacier dynamics; ice sheet; inverse analysis; sensitivity analysis; spatial distribution; temperature; uncertainty analysis; Antarctic Peninsula; Antarctica; Fleming Glacier; West Antarctica; Wordie Ice Shelf |
语种 | 英语 |
scopus关键词 | bedrock; bottom friction; boundary condition; glacier dynamics; ice sheet; inverse analysis; sensitivity analysis; spatial distribution; temperature; uncertainty analysis; Antarctic Peninsula; Antarctica; Fleming Glacier; West Antarctica; Wordie Ice Shelf |
来源期刊 | Cryosphere
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/119086 |
作者单位 | School of Technology, Environments and Design, University of Tasmania, Hobart, Australia; Arctic Centre, University of Lapland, Rovaniemi, Finland; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, Australia; CSC -IT Center for Science Ltd., Espoo, Finland; Department of Earth System Science, University of California, Irvine, CA 92697-3100, United States |
推荐引用方式 GB/T 7714 | Zhao C.,Gladstone R.M.,Warner R.C.,et al. Basal friction of Fleming Glacier, Antarctica -Part 1: Sensitivity of inversion to temperature and bedrock uncertainty[J],2018,12(8). |
APA | Zhao C.,Gladstone R.M.,Warner R.C.,King M.A.,Zwinger T.,&Morlighem M..(2018).Basal friction of Fleming Glacier, Antarctica -Part 1: Sensitivity of inversion to temperature and bedrock uncertainty.Cryosphere,12(8). |
MLA | Zhao C.,et al."Basal friction of Fleming Glacier, Antarctica -Part 1: Sensitivity of inversion to temperature and bedrock uncertainty".Cryosphere 12.8(2018). |
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