Southern Ocean Intrinsic and Forced Modes of Low Frequency
A coupled Ocean-Sea ice General Circulation Model (OGCM)is used to identify a Southern Ocean southeast Pacific intrinsicmode of low frequency variability. This mode is co-locatedwith a major region of Sub-Antarctic Mode Water (SAMW)and Antarctic Intermediate Water (AAIW) formation. UsingCORE data a...
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ftunivtasecite:oai:ecite.utas.edu.au:119774 2023-05-15T13:49:03+02:00 Southern Ocean Intrinsic and Forced Modes of Low Frequency O'Kane, TJ Matear, R Chamberlain, MA Risbey, JS Sloyan, BM Horenko, I 2012 application/pdf http://afms.org.au/proceedings.html http://ecite.utas.edu.au/119774 en eng Australasian Fluid Mechanics Society http://ecite.utas.edu.au/119774/1/O'Kane et al 2012.pdf O'Kane, TJ and Matear, R and Chamberlain, MA and Risbey, JS and Sloyan, BM and Horenko, I, Southern Ocean Intrinsic and Forced Modes of Low Frequency, Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012, 03-07 December, Launceston, Australia, pp. 1-4. ISBN 978-064658373-0 (2012) [Refereed Conference Paper] http://ecite.utas.edu.au/119774 Earth Sciences Oceanography Physical Oceanography Refereed Conference Paper PeerReviewed 2012 ftunivtasecite 2019-12-13T22:18:55Z A coupled Ocean-Sea ice General Circulation Model (OGCM)is used to identify a Southern Ocean southeast Pacific intrinsicmode of low frequency variability. This mode is co-locatedwith a major region of Sub-Antarctic Mode Water (SAMW)and Antarctic Intermediate Water (AAIW) formation. UsingCORE data a comprehensive suite of experiments were carriedout to elucidate excitation and amplification mechanismsof this intrinsic mode by low frequency forcing (ENSO, SAM)and stochastic forcing due to high frequency winds. Subsurfacethermocline anomalies were found to teleconnect the Pacificand Atlantic regions of the Antarctic Circumpolar Current(ACC). The Pacific region of the ACC is characterised by intrinsicbaroclinic disturbances that respond to both SAM andENSO, while the Atlantic sector of the ACC is sensitive tohigher frequency winds that act to amplify thermocline anomaliespropagating downstream from the Pacific resonant witheastward travelling Rossby waves. This simulation study identifiesplausible mechanisms that determine the predictability ofthe Southern Ocean climate on multi-decadal timescales. Conference Object Antarc* Antarctic Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean The Antarctic Pacific |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography O'Kane, TJ Matear, R Chamberlain, MA Risbey, JS Sloyan, BM Horenko, I Southern Ocean Intrinsic and Forced Modes of Low Frequency |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
A coupled Ocean-Sea ice General Circulation Model (OGCM)is used to identify a Southern Ocean southeast Pacific intrinsicmode of low frequency variability. This mode is co-locatedwith a major region of Sub-Antarctic Mode Water (SAMW)and Antarctic Intermediate Water (AAIW) formation. UsingCORE data a comprehensive suite of experiments were carriedout to elucidate excitation and amplification mechanismsof this intrinsic mode by low frequency forcing (ENSO, SAM)and stochastic forcing due to high frequency winds. Subsurfacethermocline anomalies were found to teleconnect the Pacificand Atlantic regions of the Antarctic Circumpolar Current(ACC). The Pacific region of the ACC is characterised by intrinsicbaroclinic disturbances that respond to both SAM andENSO, while the Atlantic sector of the ACC is sensitive tohigher frequency winds that act to amplify thermocline anomaliespropagating downstream from the Pacific resonant witheastward travelling Rossby waves. This simulation study identifiesplausible mechanisms that determine the predictability ofthe Southern Ocean climate on multi-decadal timescales. |
format |
Conference Object |
author |
O'Kane, TJ Matear, R Chamberlain, MA Risbey, JS Sloyan, BM Horenko, I |
author_facet |
O'Kane, TJ Matear, R Chamberlain, MA Risbey, JS Sloyan, BM Horenko, I |
author_sort |
O'Kane, TJ |
title |
Southern Ocean Intrinsic and Forced Modes of Low Frequency |
title_short |
Southern Ocean Intrinsic and Forced Modes of Low Frequency |
title_full |
Southern Ocean Intrinsic and Forced Modes of Low Frequency |
title_fullStr |
Southern Ocean Intrinsic and Forced Modes of Low Frequency |
title_full_unstemmed |
Southern Ocean Intrinsic and Forced Modes of Low Frequency |
title_sort |
southern ocean intrinsic and forced modes of low frequency |
publisher |
Australasian Fluid Mechanics Society |
publishDate |
2012 |
url |
http://afms.org.au/proceedings.html http://ecite.utas.edu.au/119774 |
geographic |
Antarctic Southern Ocean The Antarctic Pacific |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://ecite.utas.edu.au/119774/1/O'Kane et al 2012.pdf O'Kane, TJ and Matear, R and Chamberlain, MA and Risbey, JS and Sloyan, BM and Horenko, I, Southern Ocean Intrinsic and Forced Modes of Low Frequency, Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012, 03-07 December, Launceston, Australia, pp. 1-4. ISBN 978-064658373-0 (2012) [Refereed Conference Paper] http://ecite.utas.edu.au/119774 |
_version_ |
1766250722637119488 |