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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Online Access: | http://nora.nerc.ac.uk/id/eprint/509239/ https://nora.nerc.ac.uk/id/eprint/509239/1/Hogg_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2014JC010470 |
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ftnerc:oai:nora.nerc.ac.uk:509239 2023-05-15T13:48:09+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 text http://nora.nerc.ac.uk/id/eprint/509239/ https://nora.nerc.ac.uk/id/eprint/509239/1/Hogg_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2014JC010470 en eng Wiley https://nora.nerc.ac.uk/id/eprint/509239/1/Hogg_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Hogg, Andrew McC.; Meredith, Michael P. orcid:0000-0002-7342-7756 Chambers, Don P.; Abrahamsen, E. Povl orcid:0000-0001-5924-5350 Hughes, Chris W. orcid:0000-0002-9355-0233 Morrison, Adele K. 2015 Recent trends in the Southern Ocean eddy field. Journal of Geophysical Research: Oceans, 120 (1). 257-267. https://doi.org/10.1002/2014JC010470 <https://doi.org/10.1002/2014JC010470> Publication - Article PeerReviewed 2015 ftnerc https://doi.org/10.1002/2014JC010470 2023-02-04T19:40:46Z 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 idealised 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 timescales, 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 Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic Pacific Indian Journal of Geophysical Research: Oceans 120 1 257 267 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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 idealised 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 timescales, 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. |
spellingShingle |
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 |
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 |
Wiley |
publishDate |
2015 |
url |
http://nora.nerc.ac.uk/id/eprint/509239/ https://nora.nerc.ac.uk/id/eprint/509239/1/Hogg_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2014JC010470 |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Indian |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/509239/1/Hogg_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Hogg, Andrew McC.; Meredith, Michael P. orcid:0000-0002-7342-7756 Chambers, Don P.; Abrahamsen, E. Povl orcid:0000-0001-5924-5350 Hughes, Chris W. orcid:0000-0002-9355-0233 Morrison, Adele K. 2015 Recent trends in the Southern Ocean eddy field. Journal of Geophysical Research: Oceans, 120 (1). 257-267. https://doi.org/10.1002/2014JC010470 <https://doi.org/10.1002/2014JC010470> |
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_ |
1766248792287346688 |