The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study
The Arctic sea ice cover is thinning and retreating, causing changes in surface roughness that in turn modify the momentum flux from the atmosphere through the ice into the ocean. New model simulations comprising variable sea ice drag coefficients for both the air and water interface demonstrate tha...
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Online Access: | https://oceanrep.geomar.de/id/eprint/31397/ https://oceanrep.geomar.de/id/eprint/31397/1/jgrc21622.pdf https://doi.org/10.1002/2015JC011186 |
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ftoceanrep:oai:oceanrep.geomar.de:31397 2023-05-15T14:26:20+02:00 The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study Martin, Torge Tsamados, Michel Schroeder, David Feltham, Daniel L. 2016-03 text https://oceanrep.geomar.de/id/eprint/31397/ https://oceanrep.geomar.de/id/eprint/31397/1/jgrc21622.pdf https://doi.org/10.1002/2015JC011186 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/31397/1/jgrc21622.pdf Martin, T. , Tsamados, M., Schroeder, D. and Feltham, D. L. (2016) The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study. Open Access Journal of Geophysical Research: Oceans, 121 (3). pp. 1931-1952. DOI 10.1002/2015JC011186 <https://doi.org/10.1002/2015JC011186>. doi:10.1002/2015JC011186 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1002/2015JC011186 2023-04-07T15:23:32Z The Arctic sea ice cover is thinning and retreating, causing changes in surface roughness that in turn modify the momentum flux from the atmosphere through the ice into the ocean. New model simulations comprising variable sea ice drag coefficients for both the air and water interface demonstrate that the heterogeneity in sea ice surface roughness significantly impacts the spatial distribution and trends of ocean surface stress during the last decades. Simulations with constant sea ice drag coefficients as used in most climate models show an increase in annual mean ocean surface stress (0.003 N/m2 per decade, 4.6%) due to the reduction of ice thickness leading to a weakening of the ice and accelerated ice drift. In contrast, with variable drag coefficients our simulations show annual mean ocean surface stress is declining at a rate of -0.002 N/m2 per decade (3.1%) over the period 1980-2013 because of a significant reduction in surface roughness associated with an increasingly thinner and younger sea ice cover. The effectiveness of sea ice in transferring momentum does not only depend on its resistive strength against the wind forcing but is also set by its top and bottom surface roughness varying with ice types and ice conditions. This reveals the need to account for sea ice surface roughness variations in climate simulations in order to correctly represent the implications of sea ice loss under global warming Article in Journal/Newspaper Arctic Arctic Arctic Ocean Global warming Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Journal of Geophysical Research: Oceans 121 3 1931 1952 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Arctic sea ice cover is thinning and retreating, causing changes in surface roughness that in turn modify the momentum flux from the atmosphere through the ice into the ocean. New model simulations comprising variable sea ice drag coefficients for both the air and water interface demonstrate that the heterogeneity in sea ice surface roughness significantly impacts the spatial distribution and trends of ocean surface stress during the last decades. Simulations with constant sea ice drag coefficients as used in most climate models show an increase in annual mean ocean surface stress (0.003 N/m2 per decade, 4.6%) due to the reduction of ice thickness leading to a weakening of the ice and accelerated ice drift. In contrast, with variable drag coefficients our simulations show annual mean ocean surface stress is declining at a rate of -0.002 N/m2 per decade (3.1%) over the period 1980-2013 because of a significant reduction in surface roughness associated with an increasingly thinner and younger sea ice cover. The effectiveness of sea ice in transferring momentum does not only depend on its resistive strength against the wind forcing but is also set by its top and bottom surface roughness varying with ice types and ice conditions. This reveals the need to account for sea ice surface roughness variations in climate simulations in order to correctly represent the implications of sea ice loss under global warming |
format |
Article in Journal/Newspaper |
author |
Martin, Torge Tsamados, Michel Schroeder, David Feltham, Daniel L. |
spellingShingle |
Martin, Torge Tsamados, Michel Schroeder, David Feltham, Daniel L. The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
author_facet |
Martin, Torge Tsamados, Michel Schroeder, David Feltham, Daniel L. |
author_sort |
Martin, Torge |
title |
The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
title_short |
The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
title_full |
The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
title_fullStr |
The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
title_full_unstemmed |
The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study |
title_sort |
impact of variable sea ice roughness on changes in arctic ocean surface stress: a model study |
publisher |
AGU (American Geophysical Union) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/31397/ https://oceanrep.geomar.de/id/eprint/31397/1/jgrc21622.pdf https://doi.org/10.1002/2015JC011186 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Global warming Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Global warming Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/31397/1/jgrc21622.pdf Martin, T. , Tsamados, M., Schroeder, D. and Feltham, D. L. (2016) The impact of variable sea ice roughness on changes in Arctic Ocean surface stress: A model study. Open Access Journal of Geophysical Research: Oceans, 121 (3). pp. 1931-1952. DOI 10.1002/2015JC011186 <https://doi.org/10.1002/2015JC011186>. doi:10.1002/2015JC011186 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015JC011186 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
3 |
container_start_page |
1931 |
op_container_end_page |
1952 |
_version_ |
1766298842176684032 |