Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models
This paper presents an analysis of the solutions for a steady state latent heat polynya generated by an applied wind stress acting over a semi-enclosed channel using: (a) a dynamic-thermodynamic sea ice model, and (b) a steady state flux model. We examine what processes in the sea ice model are resp...
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2001
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ftdatacite:10.34657/3983 2023-05-15T15:12:28+02:00 Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models Bjornsson, H. Willmott, A.J. Mysak, L.A. Morales Maqueda, M.A. 2001 https://dx.doi.org/10.34657/3983 https://oa.tib.eu/renate/handle/123456789/5354 en eng Abingdon : Taylor and Francis Ltd. Creative Commons Attribution 4.0 International CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY flux measurement latent heat flux parameterization polynya sea ice thermodynamics Arctic Ocean 550 article CreativeWork 2001 ftdatacite https://doi.org/10.34657/3983 2022-04-01T09:37:59Z This paper presents an analysis of the solutions for a steady state latent heat polynya generated by an applied wind stress acting over a semi-enclosed channel using: (a) a dynamic-thermodynamic sea ice model, and (b) a steady state flux model. We examine what processes in the sea ice model are responsible for the maintenance of the polynya and how sensitive the results are to the choice of rheological parameters. We find that when the ice is driven onshore by an applied wind stress, a consolidated ice pack forms downwind of a zone of strong convergence in the ice velocities. The build-up of internal stresses within the consolidated ice pack becomes a crucial factor in the formation of this zone and results in a distinct polynya edge. Furthermore, within the ice pack the across-channel ice velocity varies with the across-channel distance. It is demonstrated that provided this velocity is well represented, the steady state polynya flux model solutions are in close agreement with those of the sea ice model. Experiments with the sea ice model also show that the polynya shape and area are insensitive to (a) the sea ice rheology; (b) the imposition of either free- slip or no-slip boundary conditions. These findings are used in the development of a simplified model of the consolidated ice pack dynamics, the output of which is then compared with the sea ice model results. Finally, we discuss the relevance of this study for the modelling of the North Water Polynya in northern Baffin Bay. Article in Journal/Newspaper Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice pack Sea ice DataCite Metadata Store (German National Library of Science and Technology) Arctic Arctic Ocean Baffin Bay |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
flux measurement latent heat flux parameterization polynya sea ice thermodynamics Arctic Ocean 550 |
spellingShingle |
flux measurement latent heat flux parameterization polynya sea ice thermodynamics Arctic Ocean 550 Bjornsson, H. Willmott, A.J. Mysak, L.A. Morales Maqueda, M.A. Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
topic_facet |
flux measurement latent heat flux parameterization polynya sea ice thermodynamics Arctic Ocean 550 |
description |
This paper presents an analysis of the solutions for a steady state latent heat polynya generated by an applied wind stress acting over a semi-enclosed channel using: (a) a dynamic-thermodynamic sea ice model, and (b) a steady state flux model. We examine what processes in the sea ice model are responsible for the maintenance of the polynya and how sensitive the results are to the choice of rheological parameters. We find that when the ice is driven onshore by an applied wind stress, a consolidated ice pack forms downwind of a zone of strong convergence in the ice velocities. The build-up of internal stresses within the consolidated ice pack becomes a crucial factor in the formation of this zone and results in a distinct polynya edge. Furthermore, within the ice pack the across-channel ice velocity varies with the across-channel distance. It is demonstrated that provided this velocity is well represented, the steady state polynya flux model solutions are in close agreement with those of the sea ice model. Experiments with the sea ice model also show that the polynya shape and area are insensitive to (a) the sea ice rheology; (b) the imposition of either free- slip or no-slip boundary conditions. These findings are used in the development of a simplified model of the consolidated ice pack dynamics, the output of which is then compared with the sea ice model results. Finally, we discuss the relevance of this study for the modelling of the North Water Polynya in northern Baffin Bay. |
format |
Article in Journal/Newspaper |
author |
Bjornsson, H. Willmott, A.J. Mysak, L.A. Morales Maqueda, M.A. |
author_facet |
Bjornsson, H. Willmott, A.J. Mysak, L.A. Morales Maqueda, M.A. |
author_sort |
Bjornsson, H. |
title |
Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
title_short |
Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
title_full |
Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
title_fullStr |
Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
title_full_unstemmed |
Polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
title_sort |
polynyas in a high-resolution dynamic-thermodynamic sea ice model and their parameterization using flux models |
publisher |
Abingdon : Taylor and Francis Ltd. |
publishDate |
2001 |
url |
https://dx.doi.org/10.34657/3983 https://oa.tib.eu/renate/handle/123456789/5354 |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice pack Sea ice |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin ice pack Sea ice |
op_rights |
Creative Commons Attribution 4.0 International CC BY 4.0 Unported https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.34657/3983 |
_version_ |
1766343134314233856 |