A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving
Abstract We present the first fully coupled 3D full-Stokes model of a tidewater glacier, incorporating ice flow, subglacial hydrology, plume-induced frontal melting and calving. We apply the model to Store Glacier ( Sermeq Kujalleq ) in west Greenland to simulate a year of high melt (2012) and one o...
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Language: | English |
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Cambridge University Press (CUP)
2021
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Online Access: | http://dx.doi.org/10.1017/jog.2021.109 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302100109X |
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crcambridgeupr:10.1017/jog.2021.109 2024-06-23T07:53:01+00:00 A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving Cook, Samuel J. Christoffersen, Poul Todd, Joe Natural Environment Research Council Horizon 2020 Framework Programme 2021 http://dx.doi.org/10.1017/jog.2021.109 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302100109X en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 68, issue 269, page 486-502 ISSN 0022-1430 1727-5652 journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.109 2024-06-12T04:04:49Z Abstract We present the first fully coupled 3D full-Stokes model of a tidewater glacier, incorporating ice flow, subglacial hydrology, plume-induced frontal melting and calving. We apply the model to Store Glacier ( Sermeq Kujalleq ) in west Greenland to simulate a year of high melt (2012) and one of low melt (2017). In terms of modelled hydrology, we find perennial channels extending 5 km inland from the terminus and up to 41 and 29 km inland in summer 2012 and 2017, respectively. We also report a hydrodynamic feedback that suppresses channel growth under thicker ice inland and allows water to be stored in the distributed system. At the terminus, we find hydrodynamic feedbacks exert a major control on calving through their impact on velocity. We show that 2012 marked a year in which Store Glacier developed a fully channelised drainage system, unlike 2017, where it remained only partially developed. This contrast in modelled behaviour indicates that tidewater glaciers can experience a strong hydrological, as well as oceanic, control, which is consistent with observations showing glaciers switching between types of behaviour. The fully coupled nature of the model allows us to demonstrate the likely lack of any hydrological or ice-dynamic memory at Store Glacier. Article in Journal/Newspaper glacier Greenland greenlandic Journal of Glaciology Kujalleq Sermeq Kujalleq Tidewater Cambridge University Press Greenland Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) Journal of Glaciology 1 17 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract We present the first fully coupled 3D full-Stokes model of a tidewater glacier, incorporating ice flow, subglacial hydrology, plume-induced frontal melting and calving. We apply the model to Store Glacier ( Sermeq Kujalleq ) in west Greenland to simulate a year of high melt (2012) and one of low melt (2017). In terms of modelled hydrology, we find perennial channels extending 5 km inland from the terminus and up to 41 and 29 km inland in summer 2012 and 2017, respectively. We also report a hydrodynamic feedback that suppresses channel growth under thicker ice inland and allows water to be stored in the distributed system. At the terminus, we find hydrodynamic feedbacks exert a major control on calving through their impact on velocity. We show that 2012 marked a year in which Store Glacier developed a fully channelised drainage system, unlike 2017, where it remained only partially developed. This contrast in modelled behaviour indicates that tidewater glaciers can experience a strong hydrological, as well as oceanic, control, which is consistent with observations showing glaciers switching between types of behaviour. The fully coupled nature of the model allows us to demonstrate the likely lack of any hydrological or ice-dynamic memory at Store Glacier. |
author2 |
Natural Environment Research Council Horizon 2020 Framework Programme |
format |
Article in Journal/Newspaper |
author |
Cook, Samuel J. Christoffersen, Poul Todd, Joe |
spellingShingle |
Cook, Samuel J. Christoffersen, Poul Todd, Joe A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
author_facet |
Cook, Samuel J. Christoffersen, Poul Todd, Joe |
author_sort |
Cook, Samuel J. |
title |
A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
title_short |
A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
title_full |
A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
title_fullStr |
A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
title_full_unstemmed |
A fully-coupled 3D model of a large Greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
title_sort |
fully-coupled 3d model of a large greenlandic outlet glacier with evolving subglacial hydrology, frontal plume melting and calving |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.109 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302100109X |
long_lat |
ENVELOPE(-46.037,-46.037,60.719,60.719) |
geographic |
Greenland Kujalleq |
geographic_facet |
Greenland Kujalleq |
genre |
glacier Greenland greenlandic Journal of Glaciology Kujalleq Sermeq Kujalleq Tidewater |
genre_facet |
glacier Greenland greenlandic Journal of Glaciology Kujalleq Sermeq Kujalleq Tidewater |
op_source |
Journal of Glaciology volume 68, issue 269, page 486-502 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.109 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1802644491895570432 |