A double continuum hydrological model for glacier applications
The flow of glaciers and ice streams is strongly influenced by the presence of water at the interface between ice and bed. In this paper, a hydrological model evaluating the subglacial water pressure is developed with the final aim of estimating the sliding velocities of glaciers. The global model f...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2014
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-8-137-2014 https://doaj.org/article/ea929e918b5a4453939ad398115afebb |
id |
ftdoajarticles:oai:doaj.org/article:ea929e918b5a4453939ad398115afebb |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:ea929e918b5a4453939ad398115afebb 2023-05-15T13:56:49+02:00 A double continuum hydrological model for glacier applications B. de Fleurian O. Gagliardini T. Zwinger G. Durand E. Le Meur D. Mair P. Råback 2014-01-01T00:00:00Z https://doi.org/10.5194/tc-8-137-2014 https://doaj.org/article/ea929e918b5a4453939ad398115afebb EN eng Copernicus Publications http://www.the-cryosphere.net/8/137/2014/tc-8-137-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-137-2014 https://doaj.org/article/ea929e918b5a4453939ad398115afebb The Cryosphere, Vol 8, Iss 1, Pp 137-153 (2014) Environmental sciences GE1-350 Geology QE1-996.5 article 2014 ftdoajarticles https://doi.org/10.5194/tc-8-137-2014 2022-12-31T03:55:20Z The flow of glaciers and ice streams is strongly influenced by the presence of water at the interface between ice and bed. In this paper, a hydrological model evaluating the subglacial water pressure is developed with the final aim of estimating the sliding velocities of glaciers. The global model fully couples the subglacial hydrology and the ice dynamics through a water-dependent friction law. The hydrological part of the model follows a double continuum approach which relies on the use of porous layers to compute water heads in inefficient and efficient drainage systems. This method has the advantage of a relatively low computational cost that would allow its application to large ice bodies such as Greenland or Antarctica ice streams. The hydrological model has been implemented in the finite element code Elmer/Ice, which simultaneously computes the ice flow. Herein, we present an application to the Haut Glacier d'Arolla for which we have a large number of observations, making it well suited to the purpose of validating both the hydrology and ice flow model components. The selection of hydrological, under-determined parameters from a wide range of values is guided by comparison of the model results with available glacier observations. Once this selection has been performed, the coupling between subglacial hydrology and ice dynamics is undertaken throughout a melt season. Results indicate that this new modelling approach for subglacial hydrology is able to reproduce the broad temporal and spatial patterns of the observed subglacial hydrological system. Furthermore, the coupling with the ice dynamics shows good agreement with the observed spring speed-up. Article in Journal/Newspaper Antarc* Antarctica glacier Greenland The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 8 1 137 153 |
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 B. de Fleurian O. Gagliardini T. Zwinger G. Durand E. Le Meur D. Mair P. Råback A double continuum hydrological model for glacier applications |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The flow of glaciers and ice streams is strongly influenced by the presence of water at the interface between ice and bed. In this paper, a hydrological model evaluating the subglacial water pressure is developed with the final aim of estimating the sliding velocities of glaciers. The global model fully couples the subglacial hydrology and the ice dynamics through a water-dependent friction law. The hydrological part of the model follows a double continuum approach which relies on the use of porous layers to compute water heads in inefficient and efficient drainage systems. This method has the advantage of a relatively low computational cost that would allow its application to large ice bodies such as Greenland or Antarctica ice streams. The hydrological model has been implemented in the finite element code Elmer/Ice, which simultaneously computes the ice flow. Herein, we present an application to the Haut Glacier d'Arolla for which we have a large number of observations, making it well suited to the purpose of validating both the hydrology and ice flow model components. The selection of hydrological, under-determined parameters from a wide range of values is guided by comparison of the model results with available glacier observations. Once this selection has been performed, the coupling between subglacial hydrology and ice dynamics is undertaken throughout a melt season. Results indicate that this new modelling approach for subglacial hydrology is able to reproduce the broad temporal and spatial patterns of the observed subglacial hydrological system. Furthermore, the coupling with the ice dynamics shows good agreement with the observed spring speed-up. |
format |
Article in Journal/Newspaper |
author |
B. de Fleurian O. Gagliardini T. Zwinger G. Durand E. Le Meur D. Mair P. Råback |
author_facet |
B. de Fleurian O. Gagliardini T. Zwinger G. Durand E. Le Meur D. Mair P. Råback |
author_sort |
B. de Fleurian |
title |
A double continuum hydrological model for glacier applications |
title_short |
A double continuum hydrological model for glacier applications |
title_full |
A double continuum hydrological model for glacier applications |
title_fullStr |
A double continuum hydrological model for glacier applications |
title_full_unstemmed |
A double continuum hydrological model for glacier applications |
title_sort |
double continuum hydrological model for glacier applications |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-137-2014 https://doaj.org/article/ea929e918b5a4453939ad398115afebb |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica glacier Greenland The Cryosphere |
genre_facet |
Antarc* Antarctica glacier Greenland The Cryosphere |
op_source |
The Cryosphere, Vol 8, Iss 1, Pp 137-153 (2014) |
op_relation |
http://www.the-cryosphere.net/8/137/2014/tc-8-137-2014.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-8-137-2014 https://doaj.org/article/ea929e918b5a4453939ad398115afebb |
op_doi |
https://doi.org/10.5194/tc-8-137-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
1 |
container_start_page |
137 |
op_container_end_page |
153 |
_version_ |
1766264396983566336 |