Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean
International audience This study examines the relative importance of the mean advection and mesoscale currents in the property exchange between the Southern Ocean mixed layer and downstream in the upper 2000 m; this exchange is referred to as ventilation. A new, highly efficient off-line tracer mod...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://insu.hal.science/insu-03727071 https://insu.hal.science/insu-03727071/document https://insu.hal.science/insu-03727071/file/JGR%20Oceans%20-%202017%20-%20Kamenkovich%20-%20Importance%20of%20mesoscale%20eddies%20and%20mean%20circulation%20in%20ventilation%20of%20the%20Southern%20Ocean.pdf https://doi.org/10.1002/2016JC012292 |
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ftuniparissaclay:oai:HAL:insu-03727071v1 2024-09-15T17:43:23+00:00 Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean Kamenkovich, Igor Garraffo, Zulema Pennel, Romain Fine, Rana A. Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) 2017 https://insu.hal.science/insu-03727071 https://insu.hal.science/insu-03727071/document https://insu.hal.science/insu-03727071/file/JGR%20Oceans%20-%202017%20-%20Kamenkovich%20-%20Importance%20of%20mesoscale%20eddies%20and%20mean%20circulation%20in%20ventilation%20of%20the%20Southern%20Ocean.pdf https://doi.org/10.1002/2016JC012292 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2016JC012292 insu-03727071 https://insu.hal.science/insu-03727071 https://insu.hal.science/insu-03727071/document https://insu.hal.science/insu-03727071/file/JGR%20Oceans%20-%202017%20-%20Kamenkovich%20-%20Importance%20of%20mesoscale%20eddies%20and%20mean%20circulation%20in%20ventilation%20of%20the%20Southern%20Ocean.pdf BIBCODE: 2017JGRC.122.2724K doi:10.1002/2016JC012292 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03727071 Journal of Geophysical Research. Oceans, 2017, 122, pp.2724-2741. ⟨10.1002/2016JC012292⟩ Southern Ocean tracers mesoscale eddies ventilation [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2017 ftuniparissaclay https://doi.org/10.1002/2016JC012292 2024-08-30T01:48:53Z International audience This study examines the relative importance of the mean advection and mesoscale currents in the property exchange between the Southern Ocean mixed layer and downstream in the upper 2000 m; this exchange is referred to as ventilation. A new, highly efficient off-line tracer model employed here uses precalculated velocities to advect dynamically passive tracers. Two idealized tracers are considered: the Boundary Impulse Response (BIR) tracer, which helps to determine the ventilation pathways and time scales, and the Transient Surface Tracer (TST), which is relevant to transient atmospheric tracers. The importance of eddies is isolated by contrasting the control simulation with a simulation without mesoscale currents. The analysis reveals complex three-dimensional ventilation pathways, controlled by the interplay between the mean advection and eddy-induced spreading. The mean currents carry the tracers eastward within ACC and contribute to the formation of the Antarctic Intermediate Water (AAIW) in the South Pacific and South Atlantic. The main effect of eddies is to disperse tracers away from the mean pathways, and this dispersion acts to retain the BIR tracer in the Atlantic and Indian sectors and reduce the upstream influence of these regions on the South Pacific. In addition, the eddy-induced along-isopycnal spreading within ACC increases the ventilated depth and the inventory of TST. The results can be used to interpret distribution of tracers in the ocean in numerical simulations and observations. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Archives ouvertes de Paris-Saclay Journal of Geophysical Research: Oceans 122 4 2724 2741 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
Southern Ocean tracers mesoscale eddies ventilation [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Southern Ocean tracers mesoscale eddies ventilation [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Kamenkovich, Igor Garraffo, Zulema Pennel, Romain Fine, Rana A. Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
topic_facet |
Southern Ocean tracers mesoscale eddies ventilation [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience This study examines the relative importance of the mean advection and mesoscale currents in the property exchange between the Southern Ocean mixed layer and downstream in the upper 2000 m; this exchange is referred to as ventilation. A new, highly efficient off-line tracer model employed here uses precalculated velocities to advect dynamically passive tracers. Two idealized tracers are considered: the Boundary Impulse Response (BIR) tracer, which helps to determine the ventilation pathways and time scales, and the Transient Surface Tracer (TST), which is relevant to transient atmospheric tracers. The importance of eddies is isolated by contrasting the control simulation with a simulation without mesoscale currents. The analysis reveals complex three-dimensional ventilation pathways, controlled by the interplay between the mean advection and eddy-induced spreading. The mean currents carry the tracers eastward within ACC and contribute to the formation of the Antarctic Intermediate Water (AAIW) in the South Pacific and South Atlantic. The main effect of eddies is to disperse tracers away from the mean pathways, and this dispersion acts to retain the BIR tracer in the Atlantic and Indian sectors and reduce the upstream influence of these regions on the South Pacific. In addition, the eddy-induced along-isopycnal spreading within ACC increases the ventilated depth and the inventory of TST. The results can be used to interpret distribution of tracers in the ocean in numerical simulations and observations. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Kamenkovich, Igor Garraffo, Zulema Pennel, Romain Fine, Rana A. |
author_facet |
Kamenkovich, Igor Garraffo, Zulema Pennel, Romain Fine, Rana A. |
author_sort |
Kamenkovich, Igor |
title |
Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
title_short |
Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
title_full |
Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
title_fullStr |
Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
title_full_unstemmed |
Importance of mesoscale eddies and mean circulation in ventilation of the Southern Ocean |
title_sort |
importance of mesoscale eddies and mean circulation in ventilation of the southern ocean |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://insu.hal.science/insu-03727071 https://insu.hal.science/insu-03727071/document https://insu.hal.science/insu-03727071/file/JGR%20Oceans%20-%202017%20-%20Kamenkovich%20-%20Importance%20of%20mesoscale%20eddies%20and%20mean%20circulation%20in%20ventilation%20of%20the%20Southern%20Ocean.pdf https://doi.org/10.1002/2016JC012292 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03727071 Journal of Geophysical Research. Oceans, 2017, 122, pp.2724-2741. ⟨10.1002/2016JC012292⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016JC012292 insu-03727071 https://insu.hal.science/insu-03727071 https://insu.hal.science/insu-03727071/document https://insu.hal.science/insu-03727071/file/JGR%20Oceans%20-%202017%20-%20Kamenkovich%20-%20Importance%20of%20mesoscale%20eddies%20and%20mean%20circulation%20in%20ventilation%20of%20the%20Southern%20Ocean.pdf BIBCODE: 2017JGRC.122.2724K doi:10.1002/2016JC012292 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2016JC012292 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
4 |
container_start_page |
2724 |
op_container_end_page |
2741 |
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1810490351419392000 |