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...
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ftdoajarticles:oai:doaj.org/article:6dbfda1ecbad4144a0c077e99e037085 2023-05-15T18:32:31+02:00 A particle based simulation model for glacier dynamics J. A. Åström T. I. Riikilä T. Tallinen T. Zwinger D. Benn J. C. Moore J. Timonen 2013-10-01T00:00:00Z https://doi.org/10.5194/tc-7-1591-2013 https://doaj.org/article/6dbfda1ecbad4144a0c077e99e037085 EN eng Copernicus Publications http://www.the-cryosphere.net/7/1591/2013/tc-7-1591-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-7-1591-2013 1994-0416 1994-0424 https://doaj.org/article/6dbfda1ecbad4144a0c077e99e037085 The Cryosphere, Vol 7, Iss 5, Pp 1591-1602 (2013) Environmental sciences GE1-350 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/tc-7-1591-2013 2022-12-31T04:48:40Z 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 The Cryosphere Directory of Open Access Journals: DOAJ Articles Marine Glacier ENVELOPE(-78.746,-78.746,82.286,82.286) The Cryosphere 7 5 1591 1602 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 J. A. Åström T. I. Riikilä T. Tallinen T. Zwinger D. Benn J. C. Moore J. Timonen A particle based simulation model for glacier dynamics |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
J. A. Åström T. I. Riikilä T. Tallinen T. Zwinger D. Benn J. C. Moore J. Timonen |
author_facet |
J. A. Åström T. I. Riikilä T. Tallinen T. Zwinger D. Benn J. C. Moore J. Timonen |
author_sort |
J. A. Åström |
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 |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-1591-2013 https://doaj.org/article/6dbfda1ecbad4144a0c077e99e037085 |
long_lat |
ENVELOPE(-78.746,-78.746,82.286,82.286) |
geographic |
Marine Glacier |
geographic_facet |
Marine Glacier |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 5, Pp 1591-1602 (2013) |
op_relation |
http://www.the-cryosphere.net/7/1591/2013/tc-7-1591-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-7-1591-2013 1994-0416 1994-0424 https://doaj.org/article/6dbfda1ecbad4144a0c077e99e037085 |
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 |
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1766216634814431232 |