A particle based simulation model for glacier dynamics
A particle-based computer simulation model was developed for investigating the dynamics of glaciers. In the model, large ice bodies are made of discrete elastic particles which are bound together by massless elastic beams. These beams can break, which induces brittle behaviour. At loads below fractu...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2013
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-particle-based-simulation-model-for-glacier-dynamics(d0338593-52f1-4b85-8eee-1a797fe83e34).html https://doi.org/10.5194/tc-7-1591-2013 https://research-repository.st-andrews.ac.uk/bitstream/10023/5052/1/Benn_2013_TC_AParticle.pdf http://www.the-cryosphere.net/7/1591/2013/ |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/d0338593-52f1-4b85-8eee-1a797fe83e34 2023-05-15T16:41:19+02:00 A particle based simulation model for glacier dynamics Astrom, J. A. Riikila, T. I. Tallinen, T. Zwinger, T. Benn, D. Moore, J. C. Timonen, J. 2013-10-08 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-particle-based-simulation-model-for-glacier-dynamics(d0338593-52f1-4b85-8eee-1a797fe83e34).html https://doi.org/10.5194/tc-7-1591-2013 https://research-repository.st-andrews.ac.uk/bitstream/10023/5052/1/Benn_2013_TC_AParticle.pdf http://www.the-cryosphere.net/7/1591/2013/ eng eng info:eu-repo/semantics/openAccess Astrom , J A , Riikila , T I , Tallinen , T , Zwinger , T , Benn , D , Moore , J C & Timonen , J 2013 , ' A particle based simulation model for glacier dynamics ' , The Cryosphere , vol. 7 , no. 5 , pp. 1591-1602 . https://doi.org/10.5194/tc-7-1591-2013 Discrete element model Ice-sheet Size distributions Tidewater glaciers Calving glaciers Basal conditions Bergy bits Icebergs Hydrodynamics Stability article 2013 ftunstandrewcris https://doi.org/10.5194/tc-7-1591-2013 2022-07-21T07:00:18Z A particle-based computer simulation model was developed for investigating the dynamics of glaciers. In the model, large ice bodies are made of discrete elastic particles which are bound together by massless elastic beams. These beams can break, which induces brittle behaviour. At loads below fracture, beams may also break and reform with small probabilities to incorporate slowly deforming viscous behaviour in the model. This model has the advantage that it can simulate important physical processes such as ice calving and fracturing in a more realistic way than traditional continuum models. For benchmarking purposes the deformation of an ice block on a slip-free surface was compared to that of a similar block simulated with a Finite Element full-Stokes continuum model. Two simulations were performed: (1) calving of an ice block partially supported in water, similar to a grounded marine glacier terminus, and (2) fracturing of an ice block on an inclined plane of varying basal friction, which could represent transition to fast flow or surging. Despite several approximations, including restriction to two-dimensions and simplified water-ice interaction, the model was able to reproduce the size distributions of the debris observed in calving, which may be approximated by universal scaling laws. On a moderate slope, a large ice block was stable and quiescent as long as there was enough of friction against the substrate. For a critical length of frictional contact, global sliding began, and the model block disintegrated in a manner suggestive of a surging glacier. In this case the fragment size distribution produced was typical of a grinding process. Article in Journal/Newspaper Ice Sheet The Cryosphere Tidewater University of St Andrews: Research Portal Marine Glacier ENVELOPE(-78.746,-78.746,82.286,82.286) The Cryosphere 7 5 1591 1602 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Discrete element model Ice-sheet Size distributions Tidewater glaciers Calving glaciers Basal conditions Bergy bits Icebergs Hydrodynamics Stability |
spellingShingle |
Discrete element model Ice-sheet Size distributions Tidewater glaciers Calving glaciers Basal conditions Bergy bits Icebergs Hydrodynamics Stability Astrom, J. A. Riikila, T. I. Tallinen, T. Zwinger, T. Benn, D. Moore, J. C. Timonen, J. A particle based simulation model for glacier dynamics |
topic_facet |
Discrete element model Ice-sheet Size distributions Tidewater glaciers Calving glaciers Basal conditions Bergy bits Icebergs Hydrodynamics Stability |
description |
A particle-based computer simulation model was developed for investigating the dynamics of glaciers. In the model, large ice bodies are made of discrete elastic particles which are bound together by massless elastic beams. These beams can break, which induces brittle behaviour. At loads below fracture, beams may also break and reform with small probabilities to incorporate slowly deforming viscous behaviour in the model. This model has the advantage that it can simulate important physical processes such as ice calving and fracturing in a more realistic way than traditional continuum models. For benchmarking purposes the deformation of an ice block on a slip-free surface was compared to that of a similar block simulated with a Finite Element full-Stokes continuum model. Two simulations were performed: (1) calving of an ice block partially supported in water, similar to a grounded marine glacier terminus, and (2) fracturing of an ice block on an inclined plane of varying basal friction, which could represent transition to fast flow or surging. Despite several approximations, including restriction to two-dimensions and simplified water-ice interaction, the model was able to reproduce the size distributions of the debris observed in calving, which may be approximated by universal scaling laws. On a moderate slope, a large ice block was stable and quiescent as long as there was enough of friction against the substrate. For a critical length of frictional contact, global sliding began, and the model block disintegrated in a manner suggestive of a surging glacier. In this case the fragment size distribution produced was typical of a grinding process. |
format |
Article in Journal/Newspaper |
author |
Astrom, J. A. Riikila, T. I. Tallinen, T. Zwinger, T. Benn, D. Moore, J. C. Timonen, J. |
author_facet |
Astrom, J. A. Riikila, T. I. Tallinen, T. Zwinger, T. Benn, D. Moore, J. C. Timonen, J. |
author_sort |
Astrom, J. A. |
title |
A particle based simulation model for glacier dynamics |
title_short |
A particle based simulation model for glacier dynamics |
title_full |
A particle based simulation model for glacier dynamics |
title_fullStr |
A particle based simulation model for glacier dynamics |
title_full_unstemmed |
A particle based simulation model for glacier dynamics |
title_sort |
particle based simulation model for glacier dynamics |
publishDate |
2013 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-particle-based-simulation-model-for-glacier-dynamics(d0338593-52f1-4b85-8eee-1a797fe83e34).html https://doi.org/10.5194/tc-7-1591-2013 https://research-repository.st-andrews.ac.uk/bitstream/10023/5052/1/Benn_2013_TC_AParticle.pdf http://www.the-cryosphere.net/7/1591/2013/ |
long_lat |
ENVELOPE(-78.746,-78.746,82.286,82.286) |
geographic |
Marine Glacier |
geographic_facet |
Marine Glacier |
genre |
Ice Sheet The Cryosphere Tidewater |
genre_facet |
Ice Sheet The Cryosphere Tidewater |
op_source |
Astrom , J A , Riikila , T I , Tallinen , T , Zwinger , T , Benn , D , Moore , J C & Timonen , J 2013 , ' A particle based simulation model for glacier dynamics ' , The Cryosphere , vol. 7 , no. 5 , pp. 1591-1602 . https://doi.org/10.5194/tc-7-1591-2013 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-1591-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
5 |
container_start_page |
1591 |
op_container_end_page |
1602 |
_version_ |
1766031743254528000 |