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...
Published in: | Ocean Modelling |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2015
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/510434/ https://nora.nerc.ac.uk/id/eprint/510434/1/Sensitivity%20of%20Southern%20Ocean%20circulation%20to%20wind%20stress%20changes%20AAM.pdf |
id |
ftnerc:oai:nora.nerc.ac.uk:510434 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:510434 2023-05-15T18:24:54+02:00 Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress Munday, D.R. Zhai, X. 2015-11 text http://nora.nerc.ac.uk/id/eprint/510434/ https://nora.nerc.ac.uk/id/eprint/510434/1/Sensitivity%20of%20Southern%20Ocean%20circulation%20to%20wind%20stress%20changes%20AAM.pdf en eng Elsevier https://nora.nerc.ac.uk/id/eprint/510434/1/Sensitivity%20of%20Southern%20Ocean%20circulation%20to%20wind%20stress%20changes%20AAM.pdf Munday, D.R. orcid:0000-0003-1920-708X Zhai, X. 2015 Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress. Ocean Modelling, 95. 15-24. https://doi.org/10.1016/j.ocemod.2015.08.004 <https://doi.org/10.1016/j.ocemod.2015.08.004> Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.1016/j.ocemod.2015.08.004 2023-02-04T19:41:23Z 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 Natural Environment Research Council: NERC Open Research Archive Southern Ocean Ocean Modelling 95 15 24 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
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, D.R. Zhai, X. |
spellingShingle |
Munday, D.R. Zhai, X. Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress |
author_facet |
Munday, D.R. Zhai, X. |
author_sort |
Munday, D.R. |
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 |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://nora.nerc.ac.uk/id/eprint/510434/ https://nora.nerc.ac.uk/id/eprint/510434/1/Sensitivity%20of%20Southern%20Ocean%20circulation%20to%20wind%20stress%20changes%20AAM.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/510434/1/Sensitivity%20of%20Southern%20Ocean%20circulation%20to%20wind%20stress%20changes%20AAM.pdf Munday, D.R. orcid:0000-0003-1920-708X Zhai, X. 2015 Sensitivity of Southern Ocean circulation to wind stress changes: Role of relative wind stress. Ocean Modelling, 95. 15-24. https://doi.org/10.1016/j.ocemod.2015.08.004 <https://doi.org/10.1016/j.ocemod.2015.08.004> |
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 |
_version_ |
1766205907175211008 |