A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers
International audience Flow variability of ice sheets and glaciers adds a large uncertainty to projections of their evolution and their future contribution to sea level rise (e.g., Mouginot et al., 2019; Ritz et al., 2015; Shepherd et al., 2019). Ice flow variability arises from the complex relation...
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Online Access: | https://hal.science/hal-03852633 https://hal.science/hal-03852633/document https://hal.science/hal-03852633/file/Gilbert2022.pdf https://doi.org/10.1029/2021gl097507 |
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ftinsu:oai:HAL:hal-03852633v1 2024-04-28T08:25:02+00:00 A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers Gilbert, Adrien Gimbert, Florent Thøgersen, Kjetil Schuler, Thomas, V Kääb, Andreas Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) ANR-18-CE01-0015,SAUSSURE,Glissement des glaciers et pression hydrologique sous glaciaire en relat(2018) 2022-07-08 https://hal.science/hal-03852633 https://hal.science/hal-03852633/document https://hal.science/hal-03852633/file/Gilbert2022.pdf https://doi.org/10.1029/2021gl097507 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021gl097507 hal-03852633 https://hal.science/hal-03852633 https://hal.science/hal-03852633/document https://hal.science/hal-03852633/file/Gilbert2022.pdf doi:10.1029/2021gl097507 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03852633 Geophysical Research Letters, 2022, 49 (3), ⟨10.1029/2021gl097507⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1029/2021gl097507 2024-04-05T00:31:05Z International audience Flow variability of ice sheets and glaciers adds a large uncertainty to projections of their evolution and their future contribution to sea level rise (e.g., Mouginot et al., 2019; Ritz et al., 2015; Shepherd et al., 2019). Ice flow variability arises from the complex relationship between sliding speed, stress balance, water pressure, and temperature at the glacier base, all of which, in addition, depend on the properties of the substrate beneath the ice (Cuffey & Paterson, 2010). In particular, the difficulty in computing basal water pressure (e.g., Downs et al., 2018; Flowers, 2015) limits the predictive power of current ice sheet models (Ritz et al., 2015), and therefore the ability to project the future of the cryosphere under climate change. Two-way coupled models of ice flow and subglacial hydrology, in which sliding velocity has an effect on subglacial hydrology and vice-versa (e.g., Hewitt, 2013; Hoffman & Price, 2014; Pimentel et al., 2010), provide useful tools to test the sensitivity of ice dynamics to melt water supply. These models are also needed to evaluate the subglacial hydrology and friction theories by confronting modeled with observed ice velocities (Brinkerhoff et al., 2021). Ice flow and subglacial hydrology models are usually linked by a friction law that relates water pressure, basal shear stress, and sliding velocity, and an equation linking the sliding speed to the efficiency of the distributed drainage system (e.g., Bueler & van Pelt, 2015; Gagliardini & Werder, 2018; Hoffman & Price, 2014). The distributed subglacial drainage system under hard-bedded glaciers consists of a network of connected cavities ( Article in Journal/Newspaper Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 49 13 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Gilbert, Adrien Gimbert, Florent Thøgersen, Kjetil Schuler, Thomas, V Kääb, Andreas A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Flow variability of ice sheets and glaciers adds a large uncertainty to projections of their evolution and their future contribution to sea level rise (e.g., Mouginot et al., 2019; Ritz et al., 2015; Shepherd et al., 2019). Ice flow variability arises from the complex relationship between sliding speed, stress balance, water pressure, and temperature at the glacier base, all of which, in addition, depend on the properties of the substrate beneath the ice (Cuffey & Paterson, 2010). In particular, the difficulty in computing basal water pressure (e.g., Downs et al., 2018; Flowers, 2015) limits the predictive power of current ice sheet models (Ritz et al., 2015), and therefore the ability to project the future of the cryosphere under climate change. Two-way coupled models of ice flow and subglacial hydrology, in which sliding velocity has an effect on subglacial hydrology and vice-versa (e.g., Hewitt, 2013; Hoffman & Price, 2014; Pimentel et al., 2010), provide useful tools to test the sensitivity of ice dynamics to melt water supply. These models are also needed to evaluate the subglacial hydrology and friction theories by confronting modeled with observed ice velocities (Brinkerhoff et al., 2021). Ice flow and subglacial hydrology models are usually linked by a friction law that relates water pressure, basal shear stress, and sliding velocity, and an equation linking the sliding speed to the efficiency of the distributed drainage system (e.g., Bueler & van Pelt, 2015; Gagliardini & Werder, 2018; Hoffman & Price, 2014). The distributed subglacial drainage system under hard-bedded glaciers consists of a network of connected cavities ( |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) ANR-18-CE01-0015,SAUSSURE,Glissement des glaciers et pression hydrologique sous glaciaire en relat(2018) |
format |
Article in Journal/Newspaper |
author |
Gilbert, Adrien Gimbert, Florent Thøgersen, Kjetil Schuler, Thomas, V Kääb, Andreas |
author_facet |
Gilbert, Adrien Gimbert, Florent Thøgersen, Kjetil Schuler, Thomas, V Kääb, Andreas |
author_sort |
Gilbert, Adrien |
title |
A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
title_short |
A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
title_full |
A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
title_fullStr |
A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
title_full_unstemmed |
A Consistent Framework for Coupling Basal Friction With Subglacial Hydrology on Hard‐Bedded Glaciers |
title_sort |
consistent framework for coupling basal friction with subglacial hydrology on hard‐bedded glaciers |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03852633 https://hal.science/hal-03852633/document https://hal.science/hal-03852633/file/Gilbert2022.pdf https://doi.org/10.1029/2021gl097507 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03852633 Geophysical Research Letters, 2022, 49 (3), ⟨10.1029/2021gl097507⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021gl097507 hal-03852633 https://hal.science/hal-03852633 https://hal.science/hal-03852633/document https://hal.science/hal-03852633/file/Gilbert2022.pdf doi:10.1029/2021gl097507 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021gl097507 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
13 |
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1797584996169416704 |