Granular effects in sea ice rheology in the marginal ice zone
Sea ice in the marginal ice zone (MIZ) consists of relatively small floes with a wide size span. In response to oceanic and atmospheric forcing, it behaves as an approximately two-dimensional, highly polydisperse granular material. The established viscous-plastic rheologies used in continuum sea ice...
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ftpubmed:oai:pubmedcentral.nih.gov:9464512 2023-05-15T18:16:45+02:00 Granular effects in sea ice rheology in the marginal ice zone Herman, A. 2022-10-31 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9464512/ http://www.ncbi.nlm.nih.gov/pubmed/36088933 https://doi.org/10.1098/rsta.2021.0260 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9464512/ http://www.ncbi.nlm.nih.gov/pubmed/36088933 http://dx.doi.org/10.1098/rsta.2021.0260 © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. CC-BY Philos Trans A Math Phys Eng Sci Articles Text 2022 ftpubmed https://doi.org/10.1098/rsta.2021.0260 2022-10-02T00:30:47Z Sea ice in the marginal ice zone (MIZ) consists of relatively small floes with a wide size span. In response to oceanic and atmospheric forcing, it behaves as an approximately two-dimensional, highly polydisperse granular material. The established viscous-plastic rheologies used in continuum sea ice models are not suitable for the MIZ; the collisional rheology, in which sea ice is treated as a granular gas, captures only one aspect of the granular behaviour, typical for a narrow range of conditions when dynamics is dominated by binary floe collisions. This paper reviews rheology models and concepts from research on granular materials relevant for MIZ dynamics (average stress as a result of ‘microscopic’ interactions of grains; [Formula: see text] and collisional rheologies). Idealized discrete-element simulations are used to illustrate granular effects and strong influence of the floe size distribution on strain–stress relationships in sheared sea ice, demonstrating the need for an MIZ rheology model capturing the whole range of ‘regimes’, from quasi-static/dense flow in the inner MIZ to the inertial flow in the outer MIZ. This article is part of the theme issue ‘Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks’. Text Sea ice PubMed Central (PMC) Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 380 2235 |
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Articles Herman, A. Granular effects in sea ice rheology in the marginal ice zone |
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Sea ice in the marginal ice zone (MIZ) consists of relatively small floes with a wide size span. In response to oceanic and atmospheric forcing, it behaves as an approximately two-dimensional, highly polydisperse granular material. The established viscous-plastic rheologies used in continuum sea ice models are not suitable for the MIZ; the collisional rheology, in which sea ice is treated as a granular gas, captures only one aspect of the granular behaviour, typical for a narrow range of conditions when dynamics is dominated by binary floe collisions. This paper reviews rheology models and concepts from research on granular materials relevant for MIZ dynamics (average stress as a result of ‘microscopic’ interactions of grains; [Formula: see text] and collisional rheologies). Idealized discrete-element simulations are used to illustrate granular effects and strong influence of the floe size distribution on strain–stress relationships in sheared sea ice, demonstrating the need for an MIZ rheology model capturing the whole range of ‘regimes’, from quasi-static/dense flow in the inner MIZ to the inertial flow in the outer MIZ. This article is part of the theme issue ‘Theory, modelling and observations of marginal ice zone dynamics: multidisciplinary perspectives and outlooks’. |
format |
Text |
author |
Herman, A. |
author_facet |
Herman, A. |
author_sort |
Herman, A. |
title |
Granular effects in sea ice rheology in the marginal ice zone |
title_short |
Granular effects in sea ice rheology in the marginal ice zone |
title_full |
Granular effects in sea ice rheology in the marginal ice zone |
title_fullStr |
Granular effects in sea ice rheology in the marginal ice zone |
title_full_unstemmed |
Granular effects in sea ice rheology in the marginal ice zone |
title_sort |
granular effects in sea ice rheology in the marginal ice zone |
publisher |
The Royal Society |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9464512/ http://www.ncbi.nlm.nih.gov/pubmed/36088933 https://doi.org/10.1098/rsta.2021.0260 |
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Sea ice |
genre_facet |
Sea ice |
op_source |
Philos Trans A Math Phys Eng Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9464512/ http://www.ncbi.nlm.nih.gov/pubmed/36088933 http://dx.doi.org/10.1098/rsta.2021.0260 |
op_rights |
© 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsta.2021.0260 |
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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380 |
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