Melt-under-cutting and buoyancy-driven calving from tidewater glaciers: New insights from discrete element and continuum model simulations
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,...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/437120 2024-04-21T08:05:02+00:00 Melt-under-cutting and buoyancy-driven calving from tidewater glaciers: New insights from discrete element and continuum model simulations Benn, D.I. Aström, J. Zwinger, T. Todd, J. Nick, F.M. Cook, S. Hulton, N.R.J. Luckman, A. Marine and Atmospheric Research Sub Dynamics Meteorology Sub Algemeen Marine & Atmospheric Res 2017-07-24 application/pdf https://dspace.library.uu.nl/handle/1874/437120 en eng 0022-1430 https://dspace.library.uu.nl/handle/1874/437120 info:eu-repo/semantics/OpenAccess calving glacier modelling iceberg calving Article 2017 ftunivutrecht 2024-03-27T15:03:51Z 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 under-cutting 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. Article in Journal/Newspaper Ice Sheet Tidewater Utrecht University Repository |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
calving glacier modelling iceberg calving |
spellingShingle |
calving glacier modelling iceberg calving Benn, D.I. Aström, J. Zwinger, T. Todd, J. Nick, F.M. Cook, S. Hulton, N.R.J. Luckman, A. 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 |
description |
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 under-cutting 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. |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology Sub Algemeen Marine & Atmospheric Res |
format |
Article in Journal/Newspaper |
author |
Benn, D.I. Aström, J. Zwinger, T. Todd, J. Nick, F.M. Cook, S. Hulton, N.R.J. Luckman, A. |
author_facet |
Benn, D.I. Aström, J. Zwinger, T. Todd, J. Nick, F.M. Cook, S. Hulton, N.R.J. Luckman, A. |
author_sort |
Benn, D.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://dspace.library.uu.nl/handle/1874/437120 |
genre |
Ice Sheet Tidewater |
genre_facet |
Ice Sheet Tidewater |
op_relation |
0022-1430 https://dspace.library.uu.nl/handle/1874/437120 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1796944587639488512 |