SHMIP The subglacial hydrology model intercomparison Project
ABSTRACT Subglacial hydrology plays a key role in many glaciological processes, including ice dynamics via the modulation of basal sliding. Owing to the lack of an overarching theory, however, a variety of model approximations exist to represent the subglacial drainage system. The Subglacial Hydrolo...
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Language: | English |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2018.78 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000783 |
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crcambridgeupr:10.1017/jog.2018.78 2024-09-30T14:37:50+00:00 SHMIP The subglacial hydrology model intercomparison Project DE FLEURIAN, BASILE WERDER, MAURO A. BEYER, SEBASTIAN BRINKERHOFF, DOUGLAS J. DELANEY, IAN DOW, CHRISTINE F. DOWNS, JACOB GAGLIARDINI, OLIVIER HOFFMAN, MATTHEW J. HOOKE, ROGER LeB SEGUINOT, JULIEN SOMMERS, ALEAH N. 2018 http://dx.doi.org/10.1017/jog.2018.78 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000783 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 64, issue 248, page 897-916 ISSN 0022-1430 1727-5652 journal-article 2018 crcambridgeupr https://doi.org/10.1017/jog.2018.78 2024-09-18T04:01:43Z ABSTRACT Subglacial hydrology plays a key role in many glaciological processes, including ice dynamics via the modulation of basal sliding. Owing to the lack of an overarching theory, however, a variety of model approximations exist to represent the subglacial drainage system. The Subglacial Hydrology Model Intercomparison Project (SHMIP) provides a set of synthetic experiments to compare existing and future models. We present the results from 13 participating models with a focus on effective pressure and discharge. For many applications (e.g. steady states and annual variations, low input scenarios) a simple model, such as an inefficient-system-only model, a flowline or lumped model, or a porous-layer model provides results comparable to those of more complex models. However, when studying short term (e.g. diurnal) variations of the water pressure, the use of a two-dimensional model incorporating physical representations of both efficient and inefficient drainage systems yields results that are significantly different from those of simpler models and should be preferentially applied. The results also emphasise the role of water storage in the response of water pressure to transient recharge. Finally, we find that the localisation of moulins has a limited impact except in regions of sparse moulin density. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 64 248 897 916 |
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Open Polar |
collection |
Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
ABSTRACT Subglacial hydrology plays a key role in many glaciological processes, including ice dynamics via the modulation of basal sliding. Owing to the lack of an overarching theory, however, a variety of model approximations exist to represent the subglacial drainage system. The Subglacial Hydrology Model Intercomparison Project (SHMIP) provides a set of synthetic experiments to compare existing and future models. We present the results from 13 participating models with a focus on effective pressure and discharge. For many applications (e.g. steady states and annual variations, low input scenarios) a simple model, such as an inefficient-system-only model, a flowline or lumped model, or a porous-layer model provides results comparable to those of more complex models. However, when studying short term (e.g. diurnal) variations of the water pressure, the use of a two-dimensional model incorporating physical representations of both efficient and inefficient drainage systems yields results that are significantly different from those of simpler models and should be preferentially applied. The results also emphasise the role of water storage in the response of water pressure to transient recharge. Finally, we find that the localisation of moulins has a limited impact except in regions of sparse moulin density. |
format |
Article in Journal/Newspaper |
author |
DE FLEURIAN, BASILE WERDER, MAURO A. BEYER, SEBASTIAN BRINKERHOFF, DOUGLAS J. DELANEY, IAN DOW, CHRISTINE F. DOWNS, JACOB GAGLIARDINI, OLIVIER HOFFMAN, MATTHEW J. HOOKE, ROGER LeB SEGUINOT, JULIEN SOMMERS, ALEAH N. |
spellingShingle |
DE FLEURIAN, BASILE WERDER, MAURO A. BEYER, SEBASTIAN BRINKERHOFF, DOUGLAS J. DELANEY, IAN DOW, CHRISTINE F. DOWNS, JACOB GAGLIARDINI, OLIVIER HOFFMAN, MATTHEW J. HOOKE, ROGER LeB SEGUINOT, JULIEN SOMMERS, ALEAH N. SHMIP The subglacial hydrology model intercomparison Project |
author_facet |
DE FLEURIAN, BASILE WERDER, MAURO A. BEYER, SEBASTIAN BRINKERHOFF, DOUGLAS J. DELANEY, IAN DOW, CHRISTINE F. DOWNS, JACOB GAGLIARDINI, OLIVIER HOFFMAN, MATTHEW J. HOOKE, ROGER LeB SEGUINOT, JULIEN SOMMERS, ALEAH N. |
author_sort |
DE FLEURIAN, BASILE |
title |
SHMIP The subglacial hydrology model intercomparison Project |
title_short |
SHMIP The subglacial hydrology model intercomparison Project |
title_full |
SHMIP The subglacial hydrology model intercomparison Project |
title_fullStr |
SHMIP The subglacial hydrology model intercomparison Project |
title_full_unstemmed |
SHMIP The subglacial hydrology model intercomparison Project |
title_sort |
shmip the subglacial hydrology model intercomparison project |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
http://dx.doi.org/10.1017/jog.2018.78 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000783 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 64, issue 248, page 897-916 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2018.78 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
248 |
container_start_page |
897 |
op_container_end_page |
916 |
_version_ |
1811640614689701888 |