SHMIP The subglacial hydrology model intercomparison Project
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...
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ftleibnizopen:oai:oai.leibnizopen.de:b9lPoYoBbHMkKcxzv--u 2023-10-09T21:52:25+02:00 SHMIP The subglacial hydrology model intercomparison Project De Fleurian, Basile Werder, Mauro A. Beyer, Sebastian Brinkenhoff, Douglas J. Delaney, Ian Dow, Christine F. Downs, Jacob Gagliardini, Olivier Hoffman, Matthew J. HookeE, Roger LeB Seguinot, Julien Sommers, Aleah N. 2018 application/pdf https://oa.tib.eu/renate/handle/123456789/10912 https://doi.org/10.34657/9938 eng eng Cambridge : Cambridge University Press CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology 64 (2018), Nr. 248 glacier hydrology glacier modelling glaciological model experiments ice-sheet modelling subglacial processes 550 article Text 2018 ftleibnizopen https://doi.org/10.34657/9938 2023-09-17T23:17:15Z 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. publishedVersion Article in Journal/Newspaper Ice Sheet Journal of Glaciology LeibnizOpen (The Leibniz Association) |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
language |
English |
topic |
glacier hydrology glacier modelling glaciological model experiments ice-sheet modelling subglacial processes 550 |
spellingShingle |
glacier hydrology glacier modelling glaciological model experiments ice-sheet modelling subglacial processes 550 De Fleurian, Basile Werder, Mauro A. Beyer, Sebastian Brinkenhoff, Douglas J. Delaney, Ian Dow, Christine F. Downs, Jacob Gagliardini, Olivier Hoffman, Matthew J. HookeE, Roger LeB Seguinot, Julien Sommers, Aleah N. SHMIP The subglacial hydrology model intercomparison Project |
topic_facet |
glacier hydrology glacier modelling glaciological model experiments ice-sheet modelling subglacial processes 550 |
description |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
De Fleurian, Basile Werder, Mauro A. Beyer, Sebastian Brinkenhoff, Douglas J. Delaney, Ian Dow, Christine F. Downs, Jacob Gagliardini, Olivier Hoffman, Matthew J. HookeE, Roger LeB Seguinot, Julien Sommers, Aleah N. |
author_facet |
De Fleurian, Basile Werder, Mauro A. Beyer, Sebastian Brinkenhoff, Douglas J. Delaney, Ian Dow, Christine F. Downs, Jacob Gagliardini, Olivier Hoffman, Matthew J. HookeE, 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 : Cambridge University Press |
publishDate |
2018 |
url |
https://oa.tib.eu/renate/handle/123456789/10912 https://doi.org/10.34657/9938 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology 64 (2018), Nr. 248 |
op_rights |
CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.34657/9938 |
_version_ |
1779315579518189568 |