Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology
Classical sea-ice models in climate model resolution do not resolve the small-scale physics of sea ice. New methods to address this problem include modifications to established viscous-plastic (VP) rheology models, sub-gridscale parameterizations or new rheologies such as the Maxwell elasto-brittle...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2025-01-01
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| Series: | Annals of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0260305524000405/type/journal_article |
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| author | Mirjam Bourgett Martin Losch Mathieu Plante |
| author_facet | Mirjam Bourgett Martin Losch Mathieu Plante |
| author_sort | Mirjam Bourgett |
| collection | DOAJ |
| description | Classical sea-ice models in climate model resolution do not resolve the small-scale physics of sea ice. New methods to address this problem include modifications to established viscous-plastic (VP) rheology models, sub-gridscale parameterizations or new rheologies such as the Maxwell elasto-brittle (MEB) rheology. Here, we investigate differences in gridscale dynamics simulated by the VP and MEB models, their dependency on tunable model parameters and their response to added stochastic perturbations of material parameters in a new implementation in the Massachusetts Institute of Technology general circulation model. Idealized simulations are used to demonstrate that material parameters can be tuned so that both VP and MEB rheologies lead to similar cohesive stress states, arching behaviour and heterogeneity in the deformation fields. As expected, simulations with MEB rheology generally show more heterogeneity than the VP model as measured by the number of simulated linear kinematic features (LKFs). For both rheologies, the cohesion determines the emergence of LKFs. Introducing gridscale heterogeneity by random model parameter perturbation, however, leads to a larger increase of LKF numbers in the VP simulations than in the MEB simulations and similar heterogeneity between VP and MEB models. |
| format | Article |
| id | doaj-art-b7f993a44e0a4416bf913fbf21df936a |
| institution | DOAJ |
| issn | 0260-3055 1727-5644 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Annals of Glaciology |
| spelling | doaj-art-b7f993a44e0a4416bf913fbf21df936a2025-08-20T02:45:02ZengCambridge University PressAnnals of Glaciology0260-30551727-56442025-01-016610.1017/aog.2024.40Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheologyMirjam Bourgett0https://orcid.org/0009-0005-1292-8492Martin Losch1https://orcid.org/0000-0002-3824-5244Mathieu Plante2https://orcid.org/0000-0002-4555-4408Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven, GermanyAlfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven, GermanyRecherche en prévision numérique environnementale, Environnement et Changement Climatique Canada, Dorval, Québec, CanadaClassical sea-ice models in climate model resolution do not resolve the small-scale physics of sea ice. New methods to address this problem include modifications to established viscous-plastic (VP) rheology models, sub-gridscale parameterizations or new rheologies such as the Maxwell elasto-brittle (MEB) rheology. Here, we investigate differences in gridscale dynamics simulated by the VP and MEB models, their dependency on tunable model parameters and their response to added stochastic perturbations of material parameters in a new implementation in the Massachusetts Institute of Technology general circulation model. Idealized simulations are used to demonstrate that material parameters can be tuned so that both VP and MEB rheologies lead to similar cohesive stress states, arching behaviour and heterogeneity in the deformation fields. As expected, simulations with MEB rheology generally show more heterogeneity than the VP model as measured by the number of simulated linear kinematic features (LKFs). For both rheologies, the cohesion determines the emergence of LKFs. Introducing gridscale heterogeneity by random model parameter perturbation, however, leads to a larger increase of LKF numbers in the VP simulations than in the MEB simulations and similar heterogeneity between VP and MEB models.https://www.cambridge.org/core/product/identifier/S0260305524000405/type/journal_articleice rheologysea-ice dynamicssea-ice modelling |
| spellingShingle | Mirjam Bourgett Martin Losch Mathieu Plante Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology Annals of Glaciology ice rheology sea-ice dynamics sea-ice modelling |
| title | Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology |
| title_full | Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology |
| title_fullStr | Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology |
| title_full_unstemmed | Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology |
| title_short | Comparing heterogeneity of sea-ice models with viscous-plastic and Maxwell elasto-brittle rheology |
| title_sort | comparing heterogeneity of sea ice models with viscous plastic and maxwell elasto brittle rheology |
| topic | ice rheology sea-ice dynamics sea-ice modelling |
| url | https://www.cambridge.org/core/product/identifier/S0260305524000405/type/journal_article |
| work_keys_str_mv | AT mirjambourgett comparingheterogeneityofseaicemodelswithviscousplasticandmaxwellelastobrittlerheology AT martinlosch comparingheterogeneityofseaicemodelswithviscousplasticandmaxwellelastobrittlerheology AT mathieuplante comparingheterogeneityofseaicemodelswithviscousplasticandmaxwellelastobrittlerheology |