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 have been suggested to strongly depend on openings in the sea ice cover, which are associated with fine-scal...
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2023
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ftdoajarticles:oai:doaj.org/article:5597ae4184884aedbbc2865e7e240d5d 2023-05-15T14:29:22+02:00 Arctic sea ice mass balance in a new coupled ice–ocean model using a brittle rheology framework G. Boutin E. Ólason P. Rampal H. Regan C. Lique C. Talandier L. Brodeau R. Ricker 2023-02-01T00:00:00Z https://doi.org/10.5194/tc-17-617-2023 https://doaj.org/article/5597ae4184884aedbbc2865e7e240d5d EN eng Copernicus Publications https://tc.copernicus.org/articles/17/617/2023/tc-17-617-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-617-2023 1994-0416 1994-0424 https://doaj.org/article/5597ae4184884aedbbc2865e7e240d5d The Cryosphere, Vol 17, Pp 617-638 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-617-2023 2023-02-12T01:30:18Z 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 have been suggested to 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 ( ≃ 5 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. This rheology has been shown to reproduce observed characteristics and complexity of fine-scale sea ice deformations at relatively coarse resolutions. 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. Model values show a good match with observations, remaining within the estimated uncertainty, and the interannual variability of the dynamic contribution to the winter mass balance is generally well captured. We discuss the relative contributions of dynamics and thermodynamics to the sea ice mass balance in the Arctic Basin for 2000–2018. Using the ability of the model to represent divergence motions at different scales, we investigate the role of leads and polynyas in ice production. We suggest a way to estimate the contribution of leads and polynyas to ice growth in winter, and we estimate this contribution to add up to 25 %–35 % of the total ice growth in pack ice from January to March. This contribution shows a significant increase over ... Article in Journal/Newspaper Arctic Basin Arctic Fram Strait Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic The Cryosphere 17 2 617 638 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 G. Boutin E. Ólason P. Rampal H. Regan C. Lique C. Talandier L. Brodeau R. Ricker Arctic sea ice mass balance in a new coupled ice–ocean model using a brittle rheology framework |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 have been suggested to 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 ( ≃ 5 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. This rheology has been shown to reproduce observed characteristics and complexity of fine-scale sea ice deformations at relatively coarse resolutions. 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. Model values show a good match with observations, remaining within the estimated uncertainty, and the interannual variability of the dynamic contribution to the winter mass balance is generally well captured. We discuss the relative contributions of dynamics and thermodynamics to the sea ice mass balance in the Arctic Basin for 2000–2018. Using the ability of the model to represent divergence motions at different scales, we investigate the role of leads and polynyas in ice production. We suggest a way to estimate the contribution of leads and polynyas to ice growth in winter, and we estimate this contribution to add up to 25 %–35 % of the total ice growth in pack ice from January to March. This contribution shows a significant increase over ... |
format |
Article in Journal/Newspaper |
author |
G. Boutin E. Ólason P. Rampal H. Regan C. Lique C. Talandier L. Brodeau R. Ricker |
author_facet |
G. Boutin E. Ólason P. Rampal H. Regan C. Lique C. Talandier L. Brodeau R. Ricker |
author_sort |
G. Boutin |
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 Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-617-2023 https://doaj.org/article/5597ae4184884aedbbc2865e7e240d5d |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Basin Arctic Fram Strait Sea ice The Cryosphere |
genre_facet |
Arctic Basin Arctic Fram Strait Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 617-638 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/617/2023/tc-17-617-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-617-2023 1994-0416 1994-0424 https://doaj.org/article/5597ae4184884aedbbc2865e7e240d5d |
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 |
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1766303393593163776 |