Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology
The Maxwell elasto-brittle (MEB) rheology is implemented in the Eulerian finite-difference (FD) modeling framework commonly used in classical viscous-plastic (VP) models. The role of the damage parameterization, the cornerstone of the MEB rheology, in the formation and collapse of ice arches and ice...
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Online Access: | https://doi.org/10.5194/tc-14-2137-2020 https://tc.copernicus.org/articles/14/2137/2020/ |
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ftcopernicus:oai:publications.copernicus.org:tc79951 2023-05-15T15:11:09+02:00 Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology Plante, Mathieu Tremblay, Bruno Losch, Martin Lemieux, Jean-François 2020-07-01 application/pdf https://doi.org/10.5194/tc-14-2137-2020 https://tc.copernicus.org/articles/14/2137/2020/ eng eng doi:10.5194/tc-14-2137-2020 https://tc.copernicus.org/articles/14/2137/2020/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-14-2137-2020 2020-07-20T16:22:03Z The Maxwell elasto-brittle (MEB) rheology is implemented in the Eulerian finite-difference (FD) modeling framework commonly used in classical viscous-plastic (VP) models. The role of the damage parameterization, the cornerstone of the MEB rheology, in the formation and collapse of ice arches and ice bridges in a narrow channel is investigated. Ice bridge simulations are compared with observations to derive constraints on the mechanical properties of landfast sea ice. Results show that the overall dynamical behavior documented in previous MEB models is reproduced in the FD implementation, such as the localization of the damage in space and time and the propagation of ice fractures in space at very short timescales. In the simulations, an ice arch is easily formed downstream of the channel, sustaining an ice bridge upstream. The ice bridge collapses under a critical surface forcing that depends on the material cohesion. Typical ice arch conditions observed in the Arctic are best simulated using a material cohesion in the range of 5–10 kN m −2 . Upstream of the channel, fracture lines along which convergence (ridging) takes place are oriented at an angle that depends on the angle of internal friction. Their orientation, however, deviates from the Mohr–Coulomb theory. The damage parameterization is found to cause instabilities at large compressive stresses, which prevents the production of longer-term simulations required for the formation of stable ice arches upstream of the channel between these lines of fracture. Based on these results, we propose that the stress correction scheme used in the damage parameterization be modified to remove numerical instabilities. Text Arctic Sea ice Copernicus Publications: E-Journals Arctic The Cryosphere 14 6 2137 2157 |
institution |
Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The Maxwell elasto-brittle (MEB) rheology is implemented in the Eulerian finite-difference (FD) modeling framework commonly used in classical viscous-plastic (VP) models. The role of the damage parameterization, the cornerstone of the MEB rheology, in the formation and collapse of ice arches and ice bridges in a narrow channel is investigated. Ice bridge simulations are compared with observations to derive constraints on the mechanical properties of landfast sea ice. Results show that the overall dynamical behavior documented in previous MEB models is reproduced in the FD implementation, such as the localization of the damage in space and time and the propagation of ice fractures in space at very short timescales. In the simulations, an ice arch is easily formed downstream of the channel, sustaining an ice bridge upstream. The ice bridge collapses under a critical surface forcing that depends on the material cohesion. Typical ice arch conditions observed in the Arctic are best simulated using a material cohesion in the range of 5–10 kN m −2 . Upstream of the channel, fracture lines along which convergence (ridging) takes place are oriented at an angle that depends on the angle of internal friction. Their orientation, however, deviates from the Mohr–Coulomb theory. The damage parameterization is found to cause instabilities at large compressive stresses, which prevents the production of longer-term simulations required for the formation of stable ice arches upstream of the channel between these lines of fracture. Based on these results, we propose that the stress correction scheme used in the damage parameterization be modified to remove numerical instabilities. |
format |
Text |
author |
Plante, Mathieu Tremblay, Bruno Losch, Martin Lemieux, Jean-François |
spellingShingle |
Plante, Mathieu Tremblay, Bruno Losch, Martin Lemieux, Jean-François Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
author_facet |
Plante, Mathieu Tremblay, Bruno Losch, Martin Lemieux, Jean-François |
author_sort |
Plante, Mathieu |
title |
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
title_short |
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
title_full |
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
title_fullStr |
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
title_full_unstemmed |
Landfast sea ice material properties derived from ice bridge simulations using the Maxwell elasto-brittle rheology |
title_sort |
landfast sea ice material properties derived from ice bridge simulations using the maxwell elasto-brittle rheology |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-2137-2020 https://tc.copernicus.org/articles/14/2137/2020/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-14-2137-2020 https://tc.copernicus.org/articles/14/2137/2020/ |
op_doi |
https://doi.org/10.5194/tc-14-2137-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
6 |
container_start_page |
2137 |
op_container_end_page |
2157 |
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1766342054339674112 |