Models for polythermal ice sheets and glaciers
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...
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Copernicus Publications
2017
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fttriple:oai:gotriple.eu:oai:doaj.org/article:1648a1c508d5432b867a519586c8e383 2023-05-15T16:40:47+02:00 Models for polythermal ice sheets and glaciers I. J. Hewitt C. Schoof 2017-02-01 https://doi.org/10.5194/tc-11-541-2017 http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/article/1648a1c508d5432b867a519586c8e383 en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-11-541-2017 http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/article/1648a1c508d5432b867a519586c8e383 undefined The Cryosphere, Vol 11, Iss 1, Pp 541-551 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/tc-11-541-2017 2023-01-22T18:14:08Z 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. Article in Journal/Newspaper Ice Sheet The Cryosphere Unknown The Cryosphere 11 1 541 551 |
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language |
English |
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geo envir |
spellingShingle |
geo envir I. J. Hewitt C. Schoof Models for polythermal ice sheets and glaciers |
topic_facet |
geo envir |
description |
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. |
format |
Article in Journal/Newspaper |
author |
I. J. Hewitt C. Schoof |
author_facet |
I. J. Hewitt C. Schoof |
author_sort |
I. J. Hewitt |
title |
Models for polythermal ice sheets and glaciers |
title_short |
Models for polythermal ice sheets and glaciers |
title_full |
Models for polythermal ice sheets and glaciers |
title_fullStr |
Models for polythermal ice sheets and glaciers |
title_full_unstemmed |
Models for polythermal ice sheets and glaciers |
title_sort |
models for polythermal ice sheets and glaciers |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-541-2017 http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/article/1648a1c508d5432b867a519586c8e383 |
genre |
Ice Sheet The Cryosphere |
genre_facet |
Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 11, Iss 1, Pp 541-551 (2017) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-11-541-2017 http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/article/1648a1c508d5432b867a519586c8e383 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-11-541-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
1 |
container_start_page |
541 |
op_container_end_page |
551 |
_version_ |
1766031206570262528 |