Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017
AbstractDrifter, satellite, expendable bathythermograph (XBT), and Argo float data are used to study the response of the Pacific Sector of the Southern Ocean (PSSO) to the wind stress field in the period 1995–2017, in terms of eddy field, water mass transport, and heat fluxes at large and regional s...
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Online Access: | https://www.openaccessrepository.it/record/91977 https://doi.org/10.1029/2019jc015696 |
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ftopenaccessrep:oai:zenodo.org:91977 2023-10-25T01:31:09+02:00 Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 Yuri Cotroneo Gianna Fusco R. Di Lemma Pierpaolo Falco Enrico Zambianchi Milena Menna Giorgio Budillon Pierre-Marie Poulain 2020-10-01 https://www.openaccessrepository.it/record/91977 https://doi.org/10.1029/2019jc015696 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/91977 doi:10.1029/2019jc015696 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Aurora Universities Network NEANIAS Atmospheric Research Community Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.1029/2019jc015696 2023-09-26T22:21:40Z AbstractDrifter, satellite, expendable bathythermograph (XBT), and Argo float data are used to study the response of the Pacific Sector of the Southern Ocean (PSSO) to the wind stress field in the period 1995–2017, in terms of eddy field, water mass transport, and heat fluxes at large and regional scales. Increasing wind stress over the PSSO in those two decades led to a growth of the Eddy Kinetic Energy (EKE) in the region of the Antarctic Circumpolar Current (ACC). Increases of the EKE occur with delays of 1–4 years with respect to peaks in the zonal component of the wind stress. The persistent ACC meander located south of New Zealand (between 150°E and 180°W and 50°S to 66°S) responds to the interannual wind variations earlier than the entire ACC branch in the PSSO. In the same area, an estimate of the ACC transport based on in situ data shows interannual variability but no significant decadal trend over the study period. The effects of the EKE variability on the meridional eddy heat fluxes are significant on interannual scales. The strengthening of the EKE field leads to a local increase in the poleward meridional eddy heat fluxes in the PSSO, especially in the ACC band. The weakening of the EKE field defines an area of equatorward meridional eddy heat fluxes in the middle of the PSSO (south of 40°S, between 130°W and 160°W) and prevalent poleward fluxes in the further western and eastern regions. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic New Zealand Pacific Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 125 10 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Aurora Universities Network NEANIAS Atmospheric Research Community Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
spellingShingle |
Aurora Universities Network NEANIAS Atmospheric Research Community Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography Yuri Cotroneo Gianna Fusco R. Di Lemma Pierpaolo Falco Enrico Zambianchi Milena Menna Giorgio Budillon Pierre-Marie Poulain Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
topic_facet |
Aurora Universities Network NEANIAS Atmospheric Research Community Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Geochemistry and Petrology Geophysics Oceanography |
description |
AbstractDrifter, satellite, expendable bathythermograph (XBT), and Argo float data are used to study the response of the Pacific Sector of the Southern Ocean (PSSO) to the wind stress field in the period 1995–2017, in terms of eddy field, water mass transport, and heat fluxes at large and regional scales. Increasing wind stress over the PSSO in those two decades led to a growth of the Eddy Kinetic Energy (EKE) in the region of the Antarctic Circumpolar Current (ACC). Increases of the EKE occur with delays of 1–4 years with respect to peaks in the zonal component of the wind stress. The persistent ACC meander located south of New Zealand (between 150°E and 180°W and 50°S to 66°S) responds to the interannual wind variations earlier than the entire ACC branch in the PSSO. In the same area, an estimate of the ACC transport based on in situ data shows interannual variability but no significant decadal trend over the study period. The effects of the EKE variability on the meridional eddy heat fluxes are significant on interannual scales. The strengthening of the EKE field leads to a local increase in the poleward meridional eddy heat fluxes in the PSSO, especially in the ACC band. The weakening of the EKE field defines an area of equatorward meridional eddy heat fluxes in the middle of the PSSO (south of 40°S, between 130°W and 160°W) and prevalent poleward fluxes in the further western and eastern regions. |
format |
Article in Journal/Newspaper |
author |
Yuri Cotroneo Gianna Fusco R. Di Lemma Pierpaolo Falco Enrico Zambianchi Milena Menna Giorgio Budillon Pierre-Marie Poulain |
author_facet |
Yuri Cotroneo Gianna Fusco R. Di Lemma Pierpaolo Falco Enrico Zambianchi Milena Menna Giorgio Budillon Pierre-Marie Poulain |
author_sort |
Yuri Cotroneo |
title |
Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
title_short |
Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
title_full |
Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
title_fullStr |
Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
title_full_unstemmed |
Response of the Pacific Sector of the Southern Ocean to Wind Stress Variability From 1995 to 2017 |
title_sort |
response of the pacific sector of the southern ocean to wind stress variability from 1995 to 2017 |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/91977 https://doi.org/10.1029/2019jc015696 |
geographic |
Antarctic New Zealand Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic New Zealand Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/91977 doi:10.1029/2019jc015696 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1029/2019jc015696 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
10 |
_version_ |
1780742805338980352 |