The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor
International audience Despite the renewed interest in the Southern Ocean, there are yet many unknowns because of the scarcity of measurements and the complexity of the thermohaline circulation. Hence the authors present here the analysis of the thermohaline circulation of the Southern Ocean of a st...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2008
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Online Access: | https://hal.archives-ouvertes.fr/hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922/document https://hal.archives-ouvertes.fr/hal-00308922/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20The%20Role%20of%20Southern%20Ocean%20Surface%20Forcings%20and%20Mixing%20in%20the%20Global%20Conveyor-1.pdf https://doi.org/10.1175/2008JPO3519.1 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Iudicone, Daniele Madec, Gurvan Blanke, Bruno Speich, Sabrina The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Despite the renewed interest in the Southern Ocean, there are yet many unknowns because of the scarcity of measurements and the complexity of the thermohaline circulation. Hence the authors present here the analysis of the thermohaline circulation of the Southern Ocean of a steady-state simulation of a coupled ice–ocean model. The study aims to clarify the roles of surface fluxes and internal mixing, with focus on the mechanisms of the upper branch of the overturning. A quantitative dynamical analysis of the water-mass transformation has been performed using a new method. Surface fluxes, including the effect of the penetrative solar radiation, produce almost 40 Sv (1 Sv ≡ 10 6 m 3 s -1 ) of Subantarctic Mode Water while about 5 Sv of the densest water masses (γ > 28.2) are formed by brine rejection on the shelves of Antarctica and in the Weddell Sea. Mixing transforms one-half of the Subantarctic Mode Water into intermediate water and Upper Circumpolar Deep Water while bottom water is produced by Lower Circumpolar Deep Water and North Atlantic Deep Water mixing with shelf water. The upwelling of part of the North Atlantic Deep Water inflow is due to internal processes, mainly downward propagation of the surface freshwater excess via vertical mixing at the base of the mixed layer. A complementary Lagrangian analysis of the thermohaline circulation will be presented in a companion paper. |
author2 |
Stazione Zoologica Anton Dohrn (SZN) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Iudicone, Daniele Madec, Gurvan Blanke, Bruno Speich, Sabrina |
author_facet |
Iudicone, Daniele Madec, Gurvan Blanke, Bruno Speich, Sabrina |
author_sort |
Iudicone, Daniele |
title |
The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
title_short |
The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
title_full |
The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
title_fullStr |
The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
title_full_unstemmed |
The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor |
title_sort |
role of southern ocean surface forcings and mixing in the global conveyor |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922/document https://hal.archives-ouvertes.fr/hal-00308922/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20The%20Role%20of%20Southern%20Ocean%20Surface%20Forcings%20and%20Mixing%20in%20the%20Global%20Conveyor-1.pdf https://doi.org/10.1175/2008JPO3519.1 |
geographic |
Southern Ocean Weddell Sea Weddell |
geographic_facet |
Southern Ocean Weddell Sea Weddell |
genre |
Antarc* Antarctica North Atlantic Deep Water North Atlantic Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctica North Atlantic Deep Water North Atlantic Southern Ocean Weddell Sea |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.archives-ouvertes.fr/hal-00308922 Journal of Physical Oceanography, American Meteorological Society, 2008, 38 (7), pp.1377-1400. ⟨10.1175/2008JPO3519.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/2008JPO3519.1 hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922/document https://hal.archives-ouvertes.fr/hal-00308922/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20The%20Role%20of%20Southern%20Ocean%20Surface%20Forcings%20and%20Mixing%20in%20the%20Global%20Conveyor-1.pdf doi:10.1175/2008JPO3519.1 IRD: PAR00003719 WOS: 000257853500002 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/2008JPO3519.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
38 |
container_issue |
7 |
container_start_page |
1377 |
op_container_end_page |
1400 |
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1766062904192270336 |
spelling |
ftccsdartic:oai:HAL:hal-00308922v1 2023-05-15T13:35:12+02:00 The Role of Southern Ocean Surface Forcings and Mixing in the Global Conveyor Iudicone, Daniele Madec, Gurvan Blanke, Bruno Speich, Sabrina Stazione Zoologica Anton Dohrn (SZN) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2008-07 https://hal.archives-ouvertes.fr/hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922/document https://hal.archives-ouvertes.fr/hal-00308922/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20The%20Role%20of%20Southern%20Ocean%20Surface%20Forcings%20and%20Mixing%20in%20the%20Global%20Conveyor-1.pdf https://doi.org/10.1175/2008JPO3519.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/2008JPO3519.1 hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922 https://hal.archives-ouvertes.fr/hal-00308922/document https://hal.archives-ouvertes.fr/hal-00308922/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20The%20Role%20of%20Southern%20Ocean%20Surface%20Forcings%20and%20Mixing%20in%20the%20Global%20Conveyor-1.pdf doi:10.1175/2008JPO3519.1 IRD: PAR00003719 WOS: 000257853500002 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.archives-ouvertes.fr/hal-00308922 Journal of Physical Oceanography, American Meteorological Society, 2008, 38 (7), pp.1377-1400. ⟨10.1175/2008JPO3519.1⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1175/2008JPO3519.1 2021-12-04T23:46:58Z International audience Despite the renewed interest in the Southern Ocean, there are yet many unknowns because of the scarcity of measurements and the complexity of the thermohaline circulation. Hence the authors present here the analysis of the thermohaline circulation of the Southern Ocean of a steady-state simulation of a coupled ice–ocean model. The study aims to clarify the roles of surface fluxes and internal mixing, with focus on the mechanisms of the upper branch of the overturning. A quantitative dynamical analysis of the water-mass transformation has been performed using a new method. Surface fluxes, including the effect of the penetrative solar radiation, produce almost 40 Sv (1 Sv ≡ 10 6 m 3 s -1 ) of Subantarctic Mode Water while about 5 Sv of the densest water masses (γ > 28.2) are formed by brine rejection on the shelves of Antarctica and in the Weddell Sea. Mixing transforms one-half of the Subantarctic Mode Water into intermediate water and Upper Circumpolar Deep Water while bottom water is produced by Lower Circumpolar Deep Water and North Atlantic Deep Water mixing with shelf water. The upwelling of part of the North Atlantic Deep Water inflow is due to internal processes, mainly downward propagation of the surface freshwater excess via vertical mixing at the base of the mixed layer. A complementary Lagrangian analysis of the thermohaline circulation will be presented in a companion paper. Article in Journal/Newspaper Antarc* Antarctica North Atlantic Deep Water North Atlantic Southern Ocean Weddell Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Weddell Sea Weddell Journal of Physical Oceanography 38 7 1377 1400 |