Interdecadal Variability of the Southern Ocean
The intrinsic variability of the Antarctic Circumpolar Current is investigated using an idealized wind-driven model. The model uses three quasigeostrophic layers, with steady wind stress forcing, and no diabatic effects. Despite the idealized nature of the model, the simulations display a robust mod...
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American Meteorological Society
2015
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/21721 2023-05-15T13:56:14+02:00 Interdecadal Variability of the Southern Ocean Hogg, Andrew Blundell, J 2015-12-07T22:27:03Z http://hdl.handle.net/1885/21721 unknown American Meteorological Society 0022-3670 http://hdl.handle.net/1885/21721 Journal of Physical Oceanography Keywords: Antarctic circumpolar current Baroclinic instability Interdecadal variability Mesoscale eddies Aerodynamics Atmospheric movements Computer simulation Mathematical models Surface topography Viscosity Wind stress Oceanography baroclinic mode ci Journal article 2015 ftanucanberra 2015-12-28T23:19:58Z The intrinsic variability of the Antarctic Circumpolar Current is investigated using an idealized wind-driven model. The model uses three quasigeostrophic layers, with steady wind stress forcing, and no diabatic effects. Despite the idealized nature of the model, the simulations display a robust mode of low-frequency variability in the flow. It is demonstrated that this variability is dependent upon the explicit simulation of the dynamics of mesoscale eddies. As such, the variability is sensitive to stratification, horizontal viscosity, bottom stress, and topography. The energetic balance of the variability is diagnosed, and a driving mechanism is proposed that involves positive feedback between the generation of eddies through baroclinic instability and the dynamics of the mean circulation. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Antarctic circumpolar current Baroclinic instability Interdecadal variability Mesoscale eddies Aerodynamics Atmospheric movements Computer simulation Mathematical models Surface topography Viscosity Wind stress Oceanography baroclinic mode ci |
spellingShingle |
Keywords: Antarctic circumpolar current Baroclinic instability Interdecadal variability Mesoscale eddies Aerodynamics Atmospheric movements Computer simulation Mathematical models Surface topography Viscosity Wind stress Oceanography baroclinic mode ci Hogg, Andrew Blundell, J Interdecadal Variability of the Southern Ocean |
topic_facet |
Keywords: Antarctic circumpolar current Baroclinic instability Interdecadal variability Mesoscale eddies Aerodynamics Atmospheric movements Computer simulation Mathematical models Surface topography Viscosity Wind stress Oceanography baroclinic mode ci |
description |
The intrinsic variability of the Antarctic Circumpolar Current is investigated using an idealized wind-driven model. The model uses three quasigeostrophic layers, with steady wind stress forcing, and no diabatic effects. Despite the idealized nature of the model, the simulations display a robust mode of low-frequency variability in the flow. It is demonstrated that this variability is dependent upon the explicit simulation of the dynamics of mesoscale eddies. As such, the variability is sensitive to stratification, horizontal viscosity, bottom stress, and topography. The energetic balance of the variability is diagnosed, and a driving mechanism is proposed that involves positive feedback between the generation of eddies through baroclinic instability and the dynamics of the mean circulation. |
format |
Article in Journal/Newspaper |
author |
Hogg, Andrew Blundell, J |
author_facet |
Hogg, Andrew Blundell, J |
author_sort |
Hogg, Andrew |
title |
Interdecadal Variability of the Southern Ocean |
title_short |
Interdecadal Variability of the Southern Ocean |
title_full |
Interdecadal Variability of the Southern Ocean |
title_fullStr |
Interdecadal Variability of the Southern Ocean |
title_full_unstemmed |
Interdecadal Variability of the Southern Ocean |
title_sort |
interdecadal variability of the southern ocean |
publisher |
American Meteorological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/21721 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Journal of Physical Oceanography |
op_relation |
0022-3670 http://hdl.handle.net/1885/21721 |
_version_ |
1766263607062953984 |