Antarctic circumpolar modes in a coupled ocean-atmosphere model
Eastward-propagating patterns in anomalous potential temperature and salinity of the Southern Ocean are analyzed in the output of a 1000-year simulation of the global coupled atmosphere-ocean GCM ECHO-G. Such features can be associated with the socalled Antarctic Circumpolar Wave (ACW). It is found...
Published in: | Ocean Dynamics |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Heidelberg
2003
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s10236-003-0041-z http://ecite.utas.edu.au/35567 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:35567 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:35567 2023-05-15T14:03:55+02:00 Antarctic circumpolar modes in a coupled ocean-atmosphere model Marsland, SJ Latif, M Legutke, S 2003 https://doi.org/10.1007/s10236-003-0041-z http://ecite.utas.edu.au/35567 en eng Springer Heidelberg http://dx.doi.org/10.1007/s10236-003-0041-z Marsland, SJ and Latif, M and Legutke, S, Antarctic circumpolar modes in a coupled ocean-atmosphere model, Ocean Dynamics, 53, (4) pp. 323-331. ISSN 1616-7341 (2003) [Refereed Article] http://ecite.utas.edu.au/35567 Earth Sciences Oceanography Physical Oceanography Refereed Article PeerReviewed 2003 ftunivtasecite https://doi.org/10.1007/s10236-003-0041-z 2019-12-13T21:14:03Z Eastward-propagating patterns in anomalous potential temperature and salinity of the Southern Ocean are analyzed in the output of a 1000-year simulation of the global coupled atmosphere-ocean GCM ECHO-G. Such features can be associated with the socalled Antarctic Circumpolar Wave (ACW). It is found that time-longitude diagrams that have traditionally been used to aid the visualization of the ACW are strongly influenced by the width of the bandpass time filtering. This is due to the masking of considerable lowfrequency variability that occurs over a broad range of time scales. Frequency-wavenumber analysis of the ACW shows that the eastward-propagating waves do have preferred spectral peaks, but that both the period and wavenumber change erratically when comparing different centuries throughout the simulation. The variability of the ACW on a variety of time scales from interannual to centennial suggests that the waiting time for a sufficient observational record to determine the time scale of variability of the real world ACW (and the associated decadal time scale predictability of climate for southern landmasses) will be a very long one. Springer-Verlag 2003. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Ocean Dynamics 53 4 323 331 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical Oceanography |
spellingShingle |
Earth Sciences Oceanography Physical Oceanography Marsland, SJ Latif, M Legutke, S Antarctic circumpolar modes in a coupled ocean-atmosphere model |
topic_facet |
Earth Sciences Oceanography Physical Oceanography |
description |
Eastward-propagating patterns in anomalous potential temperature and salinity of the Southern Ocean are analyzed in the output of a 1000-year simulation of the global coupled atmosphere-ocean GCM ECHO-G. Such features can be associated with the socalled Antarctic Circumpolar Wave (ACW). It is found that time-longitude diagrams that have traditionally been used to aid the visualization of the ACW are strongly influenced by the width of the bandpass time filtering. This is due to the masking of considerable lowfrequency variability that occurs over a broad range of time scales. Frequency-wavenumber analysis of the ACW shows that the eastward-propagating waves do have preferred spectral peaks, but that both the period and wavenumber change erratically when comparing different centuries throughout the simulation. The variability of the ACW on a variety of time scales from interannual to centennial suggests that the waiting time for a sufficient observational record to determine the time scale of variability of the real world ACW (and the associated decadal time scale predictability of climate for southern landmasses) will be a very long one. Springer-Verlag 2003. |
format |
Article in Journal/Newspaper |
author |
Marsland, SJ Latif, M Legutke, S |
author_facet |
Marsland, SJ Latif, M Legutke, S |
author_sort |
Marsland, SJ |
title |
Antarctic circumpolar modes in a coupled ocean-atmosphere model |
title_short |
Antarctic circumpolar modes in a coupled ocean-atmosphere model |
title_full |
Antarctic circumpolar modes in a coupled ocean-atmosphere model |
title_fullStr |
Antarctic circumpolar modes in a coupled ocean-atmosphere model |
title_full_unstemmed |
Antarctic circumpolar modes in a coupled ocean-atmosphere model |
title_sort |
antarctic circumpolar modes in a coupled ocean-atmosphere model |
publisher |
Springer Heidelberg |
publishDate |
2003 |
url |
https://doi.org/10.1007/s10236-003-0041-z http://ecite.utas.edu.au/35567 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://dx.doi.org/10.1007/s10236-003-0041-z Marsland, SJ and Latif, M and Legutke, S, Antarctic circumpolar modes in a coupled ocean-atmosphere model, Ocean Dynamics, 53, (4) pp. 323-331. ISSN 1616-7341 (2003) [Refereed Article] http://ecite.utas.edu.au/35567 |
op_doi |
https://doi.org/10.1007/s10236-003-0041-z |
container_title |
Ocean Dynamics |
container_volume |
53 |
container_issue |
4 |
container_start_page |
323 |
op_container_end_page |
331 |
_version_ |
1766274788559421440 |