| DOI: | 10.5194/tc-11-541-2017
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| Scopus记录号: | 2-s2.0-85012994358
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| 论文题名: | Models for polythermal ice sheets and glaciers |
| 作者: | Hewitt I; J; , Schoof C
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| 刊名: | Cryosphere
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| ISSN: | 19940416
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| 出版年: | 2017
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| 卷: | 11, 期:1 | | 起始页码: | 541
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| 结束页码: | 551
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| 语种: | 英语
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| 英文关键词: | compaction
; Darcy law
; drainage water
; enthalpy
; glacier
; ice core
; ice sheet
; numerical model
; porewater
; temperate environment
; temperature effect
; water content
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| 英文摘要: | Polythermal ice sheets and glaciers contain both cold ice and temperate ice. We present two new models to describe the temperature and water content of such ice masses, accounting for the possibility of gravity-and pressure-driven water drainage according to Darcy's law. Both models are based on the principle of energy conservation; one additionally invokes the theory of viscous compaction to calculate pore water pressure, and the other involves a modification of existing enthalpy gradient methods to include gravity-driven drainage. The models self-consistently predict the evolution of temperature in cold ice and of water content in temperate ice. Numerical solutions are described, and a number of illustrative test problems are presented, allowing comparison with existing methods. The suggested models are simple enough to be incorporated in existing ice-sheet models with little modification. © 2017 Author(s). |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/75596
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| 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: | University of Oxford, Oxford, United Kingdom; University of British ColumbiaBC, Canada
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| Recommended Citation: | |
Hewitt I,J,, Schoof C. Models for polythermal ice sheets and glaciers[J]. Cryosphere,2017-01-01,11(1)
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