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...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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crroyalsociety:10.1098/rsta.2021.0260 2024-06-02T08:14:15+00:00 Granular effects in sea ice rheology in the marginal ice zone Herman, A. Narodowe Centrum Nauki 2022 http://dx.doi.org/10.1098/rsta.2021.0260 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2021.0260 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2021.0260 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 380, issue 2235 ISSN 1364-503X 1471-2962 journal-article 2022 crroyalsociety https://doi.org/10.1098/rsta.2021.0260 2024-05-07T14:16:25Z 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; μ ( I ) 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’. Article in Journal/Newspaper Sea ice The Royal Society Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 380 2235 |
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crroyalsociety |
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English |
description |
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; μ ( I ) 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’. |
author2 |
Narodowe Centrum Nauki |
format |
Article in Journal/Newspaper |
author |
Herman, A. |
spellingShingle |
Herman, A. Granular effects in sea ice rheology in the marginal ice zone |
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://dx.doi.org/10.1098/rsta.2021.0260 https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2021.0260 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsta.2021.0260 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences volume 380, issue 2235 ISSN 1364-503X 1471-2962 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
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 |
container_volume |
380 |
container_issue |
2235 |
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1800738012593651712 |