Recent Trends in the Southern Ocean Eddy Field
Eddies in the Southern Ocean act to moderate the response of the Antarctic Circumpolar Current (ACC) to changes in forcing. An updated analysis of the Southern Ocean satellite altimetry record indicates an increase in eddy kinetic energy (EKE) in recent decades, contemporaneous with a probable decre...
Published in: | Journal of Geophysical Research: Oceans |
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ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-2411 2023-07-30T03:58:00+02:00 Recent Trends in the Southern Ocean Eddy Field Hogg, Andrew McC. Meredith, Michael P. Chambers, Don P. Abrahamsen, E. Povl Hughes, Chris W. Morrison, Adele K. 2015-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/1407 https://doi.org/10.1002/2014JC010470 https://digitalcommons.usf.edu/context/msc_facpub/article/2411/viewcontent/2014JC010470.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/1407 doi:10.1002/2014JC010470 https://digitalcommons.usf.edu/context/msc_facpub/article/2411/viewcontent/2014JC010470.pdf default Marine Science Faculty Publications Antarctic Circumpolar Current Southern Ocean Eddies Life Sciences article 2015 ftusouthflorida https://doi.org/10.1002/2014JC010470 2023-07-13T21:02:15Z Eddies in the Southern Ocean act to moderate the response of the Antarctic Circumpolar Current (ACC) to changes in forcing. An updated analysis of the Southern Ocean satellite altimetry record indicates an increase in eddy kinetic energy (EKE) in recent decades, contemporaneous with a probable decrease in ACC transport. The EKE trend is largest in the Pacific (14.9 ± 4.1 cm2 s−2 per decade) and Indian (18.3 ± 5.1 cm2 s−2 per decade) sectors of the Southern Ocean. We test the hypothesis that variations in wind stress can account for the observed EKE trends using perturbation experiments conducted with idealized high-resolution ocean models. The decadal increase in EKE is most likely due to continuing increases in the wind stress over the Southern Ocean, albeit with considerable interannual variability superposed. ACC transport correlates well with wind stress on these interannual time scales, but is weakly affected by wind forcing at longer periods. The increasing intensity of the Southern Ocean eddy field has implications for overturning circulation, carbon cycling, and climate. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of South Florida St. Petersburg: Digital USFSP Antarctic Indian Pacific Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 120 1 257 267 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Antarctic Circumpolar Current Southern Ocean Eddies Life Sciences |
spellingShingle |
Antarctic Circumpolar Current Southern Ocean Eddies Life Sciences Hogg, Andrew McC. Meredith, Michael P. Chambers, Don P. Abrahamsen, E. Povl Hughes, Chris W. Morrison, Adele K. Recent Trends in the Southern Ocean Eddy Field |
topic_facet |
Antarctic Circumpolar Current Southern Ocean Eddies Life Sciences |
description |
Eddies in the Southern Ocean act to moderate the response of the Antarctic Circumpolar Current (ACC) to changes in forcing. An updated analysis of the Southern Ocean satellite altimetry record indicates an increase in eddy kinetic energy (EKE) in recent decades, contemporaneous with a probable decrease in ACC transport. The EKE trend is largest in the Pacific (14.9 ± 4.1 cm2 s−2 per decade) and Indian (18.3 ± 5.1 cm2 s−2 per decade) sectors of the Southern Ocean. We test the hypothesis that variations in wind stress can account for the observed EKE trends using perturbation experiments conducted with idealized high-resolution ocean models. The decadal increase in EKE is most likely due to continuing increases in the wind stress over the Southern Ocean, albeit with considerable interannual variability superposed. ACC transport correlates well with wind stress on these interannual time scales, but is weakly affected by wind forcing at longer periods. The increasing intensity of the Southern Ocean eddy field has implications for overturning circulation, carbon cycling, and climate. |
format |
Article in Journal/Newspaper |
author |
Hogg, Andrew McC. Meredith, Michael P. Chambers, Don P. Abrahamsen, E. Povl Hughes, Chris W. Morrison, Adele K. |
author_facet |
Hogg, Andrew McC. Meredith, Michael P. Chambers, Don P. Abrahamsen, E. Povl Hughes, Chris W. Morrison, Adele K. |
author_sort |
Hogg, Andrew McC. |
title |
Recent Trends in the Southern Ocean Eddy Field |
title_short |
Recent Trends in the Southern Ocean Eddy Field |
title_full |
Recent Trends in the Southern Ocean Eddy Field |
title_fullStr |
Recent Trends in the Southern Ocean Eddy Field |
title_full_unstemmed |
Recent Trends in the Southern Ocean Eddy Field |
title_sort |
recent trends in the southern ocean eddy field |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2015 |
url |
https://digitalcommons.usf.edu/msc_facpub/1407 https://doi.org/10.1002/2014JC010470 https://digitalcommons.usf.edu/context/msc_facpub/article/2411/viewcontent/2014JC010470.pdf |
geographic |
Antarctic Indian Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/1407 doi:10.1002/2014JC010470 https://digitalcommons.usf.edu/context/msc_facpub/article/2411/viewcontent/2014JC010470.pdf |
op_rights |
default |
op_doi |
https://doi.org/10.1002/2014JC010470 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
1 |
container_start_page |
257 |
op_container_end_page |
267 |
_version_ |
1772820703129632768 |