A viscoelastic phase-field model for iceberg calving ...
Iceberg calving accounts for around half of the ice lost annually from Antarctica, but realistic representation of fracture and calving in large-scale ice sheet models remains a major unsolved problem in glaciology. We present a new phase-field viscoelastic model for fracture that simulates the slow...
Main Authors: | , , |
---|---|
Format: | Report |
Language: | unknown |
Published: |
arXiv
2023
|
Subjects: | |
Online Access: | https://dx.doi.org/10.48550/arxiv.2306.08405 https://arxiv.org/abs/2306.08405 |
id |
ftdatacite:10.48550/arxiv.2306.08405 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.48550/arxiv.2306.08405 2023-07-23T04:15:52+02:00 A viscoelastic phase-field model for iceberg calving ... Stocek, Jakub Arthern, Robert J. Marsh, Oliver J. 2023 https://dx.doi.org/10.48550/arxiv.2306.08405 https://arxiv.org/abs/2306.08405 unknown arXiv Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Fluid Dynamics physics.flu-dyn Geophysics physics.geo-ph FOS Physical sciences CreativeWork Preprint article Article 2023 ftdatacite https://doi.org/10.48550/arxiv.2306.08405 2023-07-03T19:17:57Z Iceberg calving accounts for around half of the ice lost annually from Antarctica, but realistic representation of fracture and calving in large-scale ice sheet models remains a major unsolved problem in glaciology. We present a new phase-field viscoelastic model for fracture that simulates the slow deformation of ice and the distribution and evolution of cracks. Cracks nucleate and propagate in response to the evolving stress field, and are influenced by water pressure below sea level. The model incorporates nonlinear-viscous rheology, linear-elastic rheology, and a phase-field variational formulation, which allows simulation of complex fracture phenomena. We show that this approach is capable of simulating the physical process of calving. Numerical experiments supported by a simplified model suggest that calving rate will scale with the fourth power of ice thickness for a floating ice front that has no variation across flow. The equations make no assumptions about the style of calving, so they would also ... Report Antarc* Antarctica Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Fluid Dynamics physics.flu-dyn Geophysics physics.geo-ph FOS Physical sciences |
spellingShingle |
Fluid Dynamics physics.flu-dyn Geophysics physics.geo-ph FOS Physical sciences Stocek, Jakub Arthern, Robert J. Marsh, Oliver J. A viscoelastic phase-field model for iceberg calving ... |
topic_facet |
Fluid Dynamics physics.flu-dyn Geophysics physics.geo-ph FOS Physical sciences |
description |
Iceberg calving accounts for around half of the ice lost annually from Antarctica, but realistic representation of fracture and calving in large-scale ice sheet models remains a major unsolved problem in glaciology. We present a new phase-field viscoelastic model for fracture that simulates the slow deformation of ice and the distribution and evolution of cracks. Cracks nucleate and propagate in response to the evolving stress field, and are influenced by water pressure below sea level. The model incorporates nonlinear-viscous rheology, linear-elastic rheology, and a phase-field variational formulation, which allows simulation of complex fracture phenomena. We show that this approach is capable of simulating the physical process of calving. Numerical experiments supported by a simplified model suggest that calving rate will scale with the fourth power of ice thickness for a floating ice front that has no variation across flow. The equations make no assumptions about the style of calving, so they would also ... |
format |
Report |
author |
Stocek, Jakub Arthern, Robert J. Marsh, Oliver J. |
author_facet |
Stocek, Jakub Arthern, Robert J. Marsh, Oliver J. |
author_sort |
Stocek, Jakub |
title |
A viscoelastic phase-field model for iceberg calving ... |
title_short |
A viscoelastic phase-field model for iceberg calving ... |
title_full |
A viscoelastic phase-field model for iceberg calving ... |
title_fullStr |
A viscoelastic phase-field model for iceberg calving ... |
title_full_unstemmed |
A viscoelastic phase-field model for iceberg calving ... |
title_sort |
viscoelastic phase-field model for iceberg calving ... |
publisher |
arXiv |
publishDate |
2023 |
url |
https://dx.doi.org/10.48550/arxiv.2306.08405 https://arxiv.org/abs/2306.08405 |
genre |
Antarc* Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica Ice Sheet |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.48550/arxiv.2306.08405 |
_version_ |
1772177028560191488 |