Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations
This work was funded by the ConocoPhillips Northern Area Program (CRIOS: Calving Rates and Impact on Sea Level) and the Nordic Research Council (SVALI: Stability and Variation of Arctic Land Ice and eSTICC: eScience Tools for Investigating Climate Change in northern high latitudes). The simple calvi...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/11286 2024-04-28T08:11:06+00:00 Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations Benn, Douglas I. Åström, Jan Zwinger, Thomas Todd, Joe Nick, Faezeh M. Cook, Susan Hulton, Nicholas R. J. Luckman, Adrian University of St Andrews. School of Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute 2017-07-26T10:30:09Z 12 827484 application/pdf https://hdl.handle.net/10023/11286 https://doi.org/10.1017/jog.2017.41 eng eng Journal of Glaciology 250207323 75c69565-47e1-4d9f-96ed-6fdeeadb2b10 85028622381 000415869500012 Benn , D I , Åström , J , Zwinger , T , Todd , J , Nick , F M , Cook , S , Hulton , N R J & Luckman , A 2017 , ' Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations ' , Journal of Glaciology , vol. 63 , no. 240 , pp. 691-702 . https://doi.org/10.1017/jog.2017.41 0022-1430 ORCID: /0000-0002-3604-0886/work/64697362 ORCID: /0000-0003-3183-043X/work/65014582 https://hdl.handle.net/10023/11286 doi:10.1017/jog.2017.41 Calving Glacier modelling Iceberg calving GE Environmental Sciences NDAS BDC R2C GE Journal article 2017 ftstandrewserep https://doi.org/10.1017/jog.2017.41 2024-04-09T23:33:08Z This work was funded by the ConocoPhillips Northern Area Program (CRIOS: Calving Rates and Impact on Sea Level) and the Nordic Research Council (SVALI: Stability and Variation of Arctic Land Ice and eSTICC: eScience Tools for Investigating Climate Change in northern high latitudes). The simple calving laws currently used in ice sheet models do not adequately reflect the complexity and diversity of calving processes. To be effective, calving laws must be grounded in a sound understanding of how calving actually works. Here, we develop a new strategy for formulating calving laws, using a) the Helsinki Discrete Element Model (HiDEM) to explicitly model fracture and calving processes, and b) the continuum model Elmer/Ice to identify critical stress states associated with HiDEM calving events. A range of observed calving processes emerges spontaneously from HiDEM in response to variations in ice-front buoyancy and the size of subaqueous undercuts. Calving driven by buoyancy and melt undercutting is under-predicted by existing calving laws, but we show that the location and magnitude of HiDEM calving events can be predicted in Elmer/Ice from characteristic stress patterns. Our results open the way to developing calving laws that properly reflect the diversity of calving processes, and provide a framework for a unified theory of the calving process continuum. Peer reviewed Article in Journal/Newspaper Arctic Climate change Ice Sheet Iceberg* Journal of Glaciology Tidewater University of St Andrews: Digital Research Repository Journal of Glaciology 63 240 691 702 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Calving Glacier modelling Iceberg calving GE Environmental Sciences NDAS BDC R2C GE |
spellingShingle |
Calving Glacier modelling Iceberg calving GE Environmental Sciences NDAS BDC R2C GE Benn, Douglas I. Åström, Jan Zwinger, Thomas Todd, Joe Nick, Faezeh M. Cook, Susan Hulton, Nicholas R. J. Luckman, Adrian Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
topic_facet |
Calving Glacier modelling Iceberg calving GE Environmental Sciences NDAS BDC R2C GE |
description |
This work was funded by the ConocoPhillips Northern Area Program (CRIOS: Calving Rates and Impact on Sea Level) and the Nordic Research Council (SVALI: Stability and Variation of Arctic Land Ice and eSTICC: eScience Tools for Investigating Climate Change in northern high latitudes). The simple calving laws currently used in ice sheet models do not adequately reflect the complexity and diversity of calving processes. To be effective, calving laws must be grounded in a sound understanding of how calving actually works. Here, we develop a new strategy for formulating calving laws, using a) the Helsinki Discrete Element Model (HiDEM) to explicitly model fracture and calving processes, and b) the continuum model Elmer/Ice to identify critical stress states associated with HiDEM calving events. A range of observed calving processes emerges spontaneously from HiDEM in response to variations in ice-front buoyancy and the size of subaqueous undercuts. Calving driven by buoyancy and melt undercutting is under-predicted by existing calving laws, but we show that the location and magnitude of HiDEM calving events can be predicted in Elmer/Ice from characteristic stress patterns. Our results open the way to developing calving laws that properly reflect the diversity of calving processes, and provide a framework for a unified theory of the calving process continuum. Peer reviewed |
author2 |
University of St Andrews. School of Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute |
format |
Article in Journal/Newspaper |
author |
Benn, Douglas I. Åström, Jan Zwinger, Thomas Todd, Joe Nick, Faezeh M. Cook, Susan Hulton, Nicholas R. J. Luckman, Adrian |
author_facet |
Benn, Douglas I. Åström, Jan Zwinger, Thomas Todd, Joe Nick, Faezeh M. Cook, Susan Hulton, Nicholas R. J. Luckman, Adrian |
author_sort |
Benn, Douglas I. |
title |
Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
title_short |
Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
title_full |
Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
title_fullStr |
Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
title_full_unstemmed |
Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
title_sort |
melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations |
publishDate |
2017 |
url |
https://hdl.handle.net/10023/11286 https://doi.org/10.1017/jog.2017.41 |
genre |
Arctic Climate change Ice Sheet Iceberg* Journal of Glaciology Tidewater |
genre_facet |
Arctic Climate change Ice Sheet Iceberg* Journal of Glaciology Tidewater |
op_relation |
Journal of Glaciology 250207323 75c69565-47e1-4d9f-96ed-6fdeeadb2b10 85028622381 000415869500012 Benn , D I , Åström , J , Zwinger , T , Todd , J , Nick , F M , Cook , S , Hulton , N R J & Luckman , A 2017 , ' Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations ' , Journal of Glaciology , vol. 63 , no. 240 , pp. 691-702 . https://doi.org/10.1017/jog.2017.41 0022-1430 ORCID: /0000-0002-3604-0886/work/64697362 ORCID: /0000-0003-3183-043X/work/65014582 https://hdl.handle.net/10023/11286 doi:10.1017/jog.2017.41 |
op_doi |
https://doi.org/10.1017/jog.2017.41 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
240 |
container_start_page |
691 |
op_container_end_page |
702 |
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1797578661109432320 |