Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework
Sea ice is a key component of the Earth’s climate system as it modulates the energy exchanges and associated feedback processes at the air-sea interface in polar regions. These exchanges strongly depend on openings in the sea ice cover, which are associated with fine-scale sea ice deformations, but...
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Copernicus GmbH
2023
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ftarchimer:oai:archimer.ifremer.fr:89967 2024-05-19T07:33:39+00:00 Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework Boutin, Guillaume Ólason, Einar Örn Rampal, Pierre Regan, Heather Lique, Camille Talandier, Claude Brodeau, Laurent Ricker, Robert 2023-02 application/pdf https://archimer.ifremer.fr/doc/00788/89967/95485.pdf https://archimer.ifremer.fr/doc/00788/89967/99842.pdf https://doi.org/10.5194/tc-17-617-2023 https://archimer.ifremer.fr/doc/00788/89967/ eng eng Copernicus GmbH https://archimer.ifremer.fr/doc/00788/89967/95485.pdf https://archimer.ifremer.fr/doc/00788/89967/99842.pdf doi:10.5194/tc-17-617-2023 https://archimer.ifremer.fr/doc/00788/89967/ info:eu-repo/semantics/openAccess restricted use Cryosphere (1994-0416) (Copernicus GmbH), 2023-02 , Vol. 17 , N. 2 , P. 617-638 text Article info:eu-repo/semantics/article 2023 ftarchimer https://doi.org/10.5194/tc-17-617-2023 2024-04-23T23:31:59Z Sea ice is a key component of the Earth’s climate system as it modulates the energy exchanges and associated feedback processes at the air-sea interface in polar regions. These exchanges strongly depend on openings in the sea ice cover, which are associated with fine-scale sea ice deformations, but the importance of these processes remains poorly understood as most numerical models struggle to represent these deformations without using very costly horizontal resolutions ( 2 km). In this study, we present results from a 12 km resolution ocean–sea-ice coupled model, the first that uses a brittle rheology to represent the mechanical behaviour of sea ice. Using this rheology enables the reproduction of the observed characteristics and complexity of fine-scale sea ice deformations with little dependency on the mesh resolution. We evaluate and discuss the Arctic sea ice mass balance of this coupled model for the period 2000–2018. We first assess sea ice quantities relevant for climate (volume, extent and drift) and find that they are consistent with satellite observations. We evaluate components of the mass balance for which observations are available, i.e. sea ice volume export through Fram Strait and winter mass balance in the Arctic marginal seas for the period 2003–2018. The model performs well, particularly for the dynamic contribution to the winter mass balance. We discuss the relative contributions of dynamics and thermodynamics to the sea ice mass balance in the Arctic Basin for 2000–2018. Benefitting from the model's ability to reproduce fine-scale sea ice deformations, we estimate that the formation of sea ice in leads and polynyas contributes to 25 %–35 % of the total ice growth in pack ice from January to March, with a significant increase over 2000–2018. This coupled framework opens up new opportunities to understand and quantify the interplay between small-scale sea ice dynamics and ocean properties. Article in Journal/Newspaper Arctic Basin Arctic Fram Strait Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) The Cryosphere 17 2 617 638 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Sea ice is a key component of the Earth’s climate system as it modulates the energy exchanges and associated feedback processes at the air-sea interface in polar regions. These exchanges strongly depend on openings in the sea ice cover, which are associated with fine-scale sea ice deformations, but the importance of these processes remains poorly understood as most numerical models struggle to represent these deformations without using very costly horizontal resolutions ( 2 km). In this study, we present results from a 12 km resolution ocean–sea-ice coupled model, the first that uses a brittle rheology to represent the mechanical behaviour of sea ice. Using this rheology enables the reproduction of the observed characteristics and complexity of fine-scale sea ice deformations with little dependency on the mesh resolution. We evaluate and discuss the Arctic sea ice mass balance of this coupled model for the period 2000–2018. We first assess sea ice quantities relevant for climate (volume, extent and drift) and find that they are consistent with satellite observations. We evaluate components of the mass balance for which observations are available, i.e. sea ice volume export through Fram Strait and winter mass balance in the Arctic marginal seas for the period 2003–2018. The model performs well, particularly for the dynamic contribution to the winter mass balance. We discuss the relative contributions of dynamics and thermodynamics to the sea ice mass balance in the Arctic Basin for 2000–2018. Benefitting from the model's ability to reproduce fine-scale sea ice deformations, we estimate that the formation of sea ice in leads and polynyas contributes to 25 %–35 % of the total ice growth in pack ice from January to March, with a significant increase over 2000–2018. This coupled framework opens up new opportunities to understand and quantify the interplay between small-scale sea ice dynamics and ocean properties. |
format |
Article in Journal/Newspaper |
author |
Boutin, Guillaume Ólason, Einar Örn Rampal, Pierre Regan, Heather Lique, Camille Talandier, Claude Brodeau, Laurent Ricker, Robert |
spellingShingle |
Boutin, Guillaume Ólason, Einar Örn Rampal, Pierre Regan, Heather Lique, Camille Talandier, Claude Brodeau, Laurent Ricker, Robert Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
author_facet |
Boutin, Guillaume Ólason, Einar Örn Rampal, Pierre Regan, Heather Lique, Camille Talandier, Claude Brodeau, Laurent Ricker, Robert |
author_sort |
Boutin, Guillaume |
title |
Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
title_short |
Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
title_full |
Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
title_fullStr |
Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
title_full_unstemmed |
Arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
title_sort |
arctic sea ice mass balance in a new coupled ice-ocean model using a brittle rheology framework |
publisher |
Copernicus GmbH |
publishDate |
2023 |
url |
https://archimer.ifremer.fr/doc/00788/89967/95485.pdf https://archimer.ifremer.fr/doc/00788/89967/99842.pdf https://doi.org/10.5194/tc-17-617-2023 https://archimer.ifremer.fr/doc/00788/89967/ |
genre |
Arctic Basin Arctic Fram Strait Sea ice |
genre_facet |
Arctic Basin Arctic Fram Strait Sea ice |
op_source |
Cryosphere (1994-0416) (Copernicus GmbH), 2023-02 , Vol. 17 , N. 2 , P. 617-638 |
op_relation |
https://archimer.ifremer.fr/doc/00788/89967/95485.pdf https://archimer.ifremer.fr/doc/00788/89967/99842.pdf doi:10.5194/tc-17-617-2023 https://archimer.ifremer.fr/doc/00788/89967/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.5194/tc-17-617-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
2 |
container_start_page |
617 |
op_container_end_page |
638 |
_version_ |
1799471750366363648 |