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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ftdoajarticles:oai:doaj.org/article:1648a1c508d5432b867a519586c8e383 2023-05-15T16:40:48+02:00 Models for polythermal ice sheets and glaciers I. J. Hewitt C. Schoof 2017-02-01T00:00:00Z https://doi.org/10.5194/tc-11-541-2017 https://doaj.org/article/1648a1c508d5432b867a519586c8e383 EN eng Copernicus Publications http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-11-541-2017 https://doaj.org/article/1648a1c508d5432b867a519586c8e383 The Cryosphere, Vol 11, Iss 1, Pp 541-551 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-541-2017 2022-12-31T08:16:06Z 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 Directory of Open Access Journals: DOAJ Articles The Cryosphere 11 1 541 551 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 I. J. Hewitt C. Schoof Models for polythermal ice sheets and glaciers |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 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 |
http://www.the-cryosphere.net/11/541/2017/tc-11-541-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-11-541-2017 https://doaj.org/article/1648a1c508d5432b867a519586c8e383 |
op_doi |
https://doi.org/10.5194/tc-11-541-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
1 |
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541 |
op_container_end_page |
551 |
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1766031216762421248 |