Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode
Analysis of satellite altimeter data reveals anomalously high Eddy Kinetic Energy (EKE) in the Antarctic Circumpolar Current (ACC) during the period 2000–2002. Around 2–3 years earlier (1998), the circumpolar eastward wind stress (as quantified by the Southern Annular Mode; SAM) showed a significant...
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American Geophysical Union
2006
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ftnerc:oai:nora.nerc.ac.uk:84 2024-06-09T07:40:12+00:00 Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode Meredith, Michael P. Hogg, Andrew M. 2006-08 http://nora.nerc.ac.uk/id/eprint/84/ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006GL026499 https://doi.org/10.1029/2006GL026499 unknown American Geophysical Union Meredith, Michael P. orcid:0000-0002-7342-7756 Hogg, Andrew M. 2006 Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode. Geophysical Research Letters, 33 (16), L16608. 4, pp. https://doi.org/10.1029/2006GL026499 <https://doi.org/10.1029/2006GL026499> Hydrology Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1029/2006GL026499 2024-05-15T08:39:04Z Analysis of satellite altimeter data reveals anomalously high Eddy Kinetic Energy (EKE) in the Antarctic Circumpolar Current (ACC) during the period 2000–2002. Around 2–3 years earlier (1998), the circumpolar eastward wind stress (as quantified by the Southern Annular Mode; SAM) showed a significant positive peak, and we have shown previously that the ACC peaked around 1998 in response. An eddy-resolving ocean model is used to investigate the delay between wind forcing and the eddy response, and demonstrates that the lag is due to the time taken to influence the deep circulation of the ACC. Winds over the Southern Ocean have shown a strong climatic increase over the past few decades. If this increase in winds is also reflected as an increase in eddy activity (as our analysis suggests it might), then the increased poleward heat flux may have played a significant role in the observed warming of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Geophysical Research Letters 33 16 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Hydrology |
spellingShingle |
Hydrology Meredith, Michael P. Hogg, Andrew M. Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
topic_facet |
Hydrology |
description |
Analysis of satellite altimeter data reveals anomalously high Eddy Kinetic Energy (EKE) in the Antarctic Circumpolar Current (ACC) during the period 2000–2002. Around 2–3 years earlier (1998), the circumpolar eastward wind stress (as quantified by the Southern Annular Mode; SAM) showed a significant positive peak, and we have shown previously that the ACC peaked around 1998 in response. An eddy-resolving ocean model is used to investigate the delay between wind forcing and the eddy response, and demonstrates that the lag is due to the time taken to influence the deep circulation of the ACC. Winds over the Southern Ocean have shown a strong climatic increase over the past few decades. If this increase in winds is also reflected as an increase in eddy activity (as our analysis suggests it might), then the increased poleward heat flux may have played a significant role in the observed warming of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Meredith, Michael P. Hogg, Andrew M. |
author_facet |
Meredith, Michael P. Hogg, Andrew M. |
author_sort |
Meredith, Michael P. |
title |
Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
title_short |
Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
title_full |
Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
title_fullStr |
Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
title_full_unstemmed |
Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode |
title_sort |
circumpolar response of southern ocean eddy activity to a change in the southern annular mode |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/84/ https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006GL026499 https://doi.org/10.1029/2006GL026499 |
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_relation |
Meredith, Michael P. orcid:0000-0002-7342-7756 Hogg, Andrew M. 2006 Circumpolar response of Southern Ocean eddy activity to a change in the Southern Annular Mode. Geophysical Research Letters, 33 (16), L16608. 4, pp. https://doi.org/10.1029/2006GL026499 <https://doi.org/10.1029/2006GL026499> |
op_doi |
https://doi.org/10.1029/2006GL026499 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
16 |
_version_ |
1801383661086441472 |