Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models
Fracture lines dominate the dynamics of sea ice. They affect the ice mass balance and the heat transfer between the atmosphere and the ocean. Therefore, climate modeling and sea ice prediction require an accurate fracture representation. Most sea ice models use viscous-plastic (VP) rheologies to sim...
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ftawi:oai:epic.awi.de:54079 2023-05-15T18:16:08+02:00 Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models Ringeisen, Damien Losch, Martin Tremblay, Bruno 2021-04 application/pdf https://epic.awi.de/id/eprint/54079/ https://epic.awi.de/id/eprint/54079/1/talk_vEGU2021.pdf https://doi.org/10.5194/egusphere-egu21-1373 https://hdl.handle.net/10013/epic.d6bb08e5-d775-4a67-9678-3f8a6939a4c1 https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/54079/1/talk_vEGU2021.pdf https://hdl.handle.net/ Ringeisen, D. orcid:0000-0002-8436-6928 , Losch, M. orcid:0000-0002-3824-5244 and Tremblay, B. (2021) Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models , vEGU21: Gather Online, Online, 19 April 2021 - 30 April 2021 . doi:10.5194/egusphere-egu21-1373 <https://doi.org/10.5194/egusphere-egu21-1373> , hdl:10013/epic.d6bb08e5-d775-4a67-9678-3f8a6939a4c1 EPIC3vEGU21: Gather Online, Online, 2021-04-19-2021-04-30Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models Conference notRev 2021 ftawi https://doi.org/10.5194/egusphere-egu21-1373 2021-12-24T15:46:18Z Fracture lines dominate the dynamics of sea ice. They affect the ice mass balance and the heat transfer between the atmosphere and the ocean. Therefore, climate modeling and sea ice prediction require an accurate fracture representation. Most sea ice models use viscous-plastic (VP) rheologies to simulate sea ice internal stresses. One of the issues with these rheologies is that they overestimate the intersection angles between fracture lines, with consequences for the subsequent sea ice drift. In idealized experiments, we investigate the mechanisms linking VP rheologies and fracture angles and assess alternative rheologies for high-resolution modeling. Results show that the definition of the transition between viscous and plastic states is essential for the creation of sharp fracture lines. The fracture angles with Mohr-Coulomb yield curves agree with the Arthur fault orientation theory. Further, rheologies with Mohr-Coulomb yield curves or teardrop yield curves appear to reduce intersection angles. Finally, experiments show that these results are reproduced for different sea ice initial conditions. With rheologies that favor smaller intersection angles, sea ice models move a step closer to accurate sea ice dynamics at high-resolution. Conference Object Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Teardrop ENVELOPE(163.917,163.917,-78.150,-78.150) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Fracture lines dominate the dynamics of sea ice. They affect the ice mass balance and the heat transfer between the atmosphere and the ocean. Therefore, climate modeling and sea ice prediction require an accurate fracture representation. Most sea ice models use viscous-plastic (VP) rheologies to simulate sea ice internal stresses. One of the issues with these rheologies is that they overestimate the intersection angles between fracture lines, with consequences for the subsequent sea ice drift. In idealized experiments, we investigate the mechanisms linking VP rheologies and fracture angles and assess alternative rheologies for high-resolution modeling. Results show that the definition of the transition between viscous and plastic states is essential for the creation of sharp fracture lines. The fracture angles with Mohr-Coulomb yield curves agree with the Arthur fault orientation theory. Further, rheologies with Mohr-Coulomb yield curves or teardrop yield curves appear to reduce intersection angles. Finally, experiments show that these results are reproduced for different sea ice initial conditions. With rheologies that favor smaller intersection angles, sea ice models move a step closer to accurate sea ice dynamics at high-resolution. |
format |
Conference Object |
author |
Ringeisen, Damien Losch, Martin Tremblay, Bruno |
spellingShingle |
Ringeisen, Damien Losch, Martin Tremblay, Bruno Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
author_facet |
Ringeisen, Damien Losch, Martin Tremblay, Bruno |
author_sort |
Ringeisen, Damien |
title |
Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
title_short |
Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
title_full |
Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
title_fullStr |
Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
title_full_unstemmed |
Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
title_sort |
alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54079/ https://epic.awi.de/id/eprint/54079/1/talk_vEGU2021.pdf https://doi.org/10.5194/egusphere-egu21-1373 https://hdl.handle.net/10013/epic.d6bb08e5-d775-4a67-9678-3f8a6939a4c1 https://hdl.handle.net/ |
long_lat |
ENVELOPE(163.917,163.917,-78.150,-78.150) |
geographic |
Teardrop |
geographic_facet |
Teardrop |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
EPIC3vEGU21: Gather Online, Online, 2021-04-19-2021-04-30Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models |
op_relation |
https://epic.awi.de/id/eprint/54079/1/talk_vEGU2021.pdf https://hdl.handle.net/ Ringeisen, D. orcid:0000-0002-8436-6928 , Losch, M. orcid:0000-0002-3824-5244 and Tremblay, B. (2021) Alternative viscous-plastic rheologies for the representation of fracture lines in high-resolution sea ice models , vEGU21: Gather Online, Online, 19 April 2021 - 30 April 2021 . doi:10.5194/egusphere-egu21-1373 <https://doi.org/10.5194/egusphere-egu21-1373> , hdl:10013/epic.d6bb08e5-d775-4a67-9678-3f8a6939a4c1 |
op_doi |
https://doi.org/10.5194/egusphere-egu21-1373 |
_version_ |
1766189574198919168 |