Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress
The influence of different wind stress bulk formulae on the response of the Southern Ocean circulation to wind stress changes is investigated using an idealised channel model. Surface/mixed layer properties are found to be sensitive to the use of the relative wind stress formulation, where the wind...
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/54808/ https://ueaeprints.uea.ac.uk/id/eprint/54808/1/Munday_Zhai15.pdf https://doi.org/10.1016/j.ocemod.2015.08.004 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:54808 2023-05-15T18:24:54+02:00 Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress Munday, David Zhai, Xiaoming 2015-11 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/54808/ https://ueaeprints.uea.ac.uk/id/eprint/54808/1/Munday_Zhai15.pdf https://doi.org/10.1016/j.ocemod.2015.08.004 en eng https://ueaeprints.uea.ac.uk/id/eprint/54808/1/Munday_Zhai15.pdf Munday, David and Zhai, Xiaoming (2015) Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress. Ocean Modelling, 95. 15–24. ISSN 1463-5003 doi:10.1016/j.ocemod.2015.08.004 cc_by_nc_nd CC-BY-NC-ND Article PeerReviewed 2015 ftuniveastangl https://doi.org/10.1016/j.ocemod.2015.08.004 2023-01-30T21:41:33Z The influence of different wind stress bulk formulae on the response of the Southern Ocean circulation to wind stress changes is investigated using an idealised channel model. Surface/mixed layer properties are found to be sensitive to the use of the relative wind stress formulation, where the wind stress depends on the difference between the ocean and atmosphere velocities. Previous work has highlighted the surface eddy damping effect of this formulation, which we find leads to increased circumpolar transport. Nevertheless the transport due to thermal wind shear does lose sensitivity to wind stress changes at sufficiently high wind stress. In contrast, the sensitivity of the meridional overturning circulation is broadly the same regardless of the bulk formula used due to the adiabatic nature of the relative wind stress damping. This is a consequence of the steepening of isopycnals offsetting the reduction in eddy diffusivity in their contribution to the eddy bolus overturning, as predicted using a residual mean framework. Article in Journal/Newspaper Southern Ocean University of East Anglia: UEA Digital Repository Southern Ocean Ocean Modelling 95 15 24 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
The influence of different wind stress bulk formulae on the response of the Southern Ocean circulation to wind stress changes is investigated using an idealised channel model. Surface/mixed layer properties are found to be sensitive to the use of the relative wind stress formulation, where the wind stress depends on the difference between the ocean and atmosphere velocities. Previous work has highlighted the surface eddy damping effect of this formulation, which we find leads to increased circumpolar transport. Nevertheless the transport due to thermal wind shear does lose sensitivity to wind stress changes at sufficiently high wind stress. In contrast, the sensitivity of the meridional overturning circulation is broadly the same regardless of the bulk formula used due to the adiabatic nature of the relative wind stress damping. This is a consequence of the steepening of isopycnals offsetting the reduction in eddy diffusivity in their contribution to the eddy bolus overturning, as predicted using a residual mean framework. |
format |
Article in Journal/Newspaper |
author |
Munday, David Zhai, Xiaoming |
spellingShingle |
Munday, David Zhai, Xiaoming Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
author_facet |
Munday, David Zhai, Xiaoming |
author_sort |
Munday, David |
title |
Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
title_short |
Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
title_full |
Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
title_fullStr |
Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
title_full_unstemmed |
Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
title_sort |
sensitivity of southern ocean circulation to wind stress changes: role of relative wind stress |
publishDate |
2015 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/54808/ https://ueaeprints.uea.ac.uk/id/eprint/54808/1/Munday_Zhai15.pdf https://doi.org/10.1016/j.ocemod.2015.08.004 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/54808/1/Munday_Zhai15.pdf Munday, David and Zhai, Xiaoming (2015) Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress. Ocean Modelling, 95. 15–24. ISSN 1463-5003 doi:10.1016/j.ocemod.2015.08.004 |
op_rights |
cc_by_nc_nd |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.ocemod.2015.08.004 |
container_title |
Ocean Modelling |
container_volume |
95 |
container_start_page |
15 |
op_container_end_page |
24 |
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1766205901360857088 |