The origin and fate of mode water in the southern Pacific Ocean
International audience Understanding the origin and fate of mode and intermediate waters (MW) in the subtropical Pacific Ocean is critical for climate, as MW store and export a large volume of CO2, heat, nutrients and salinity to lower latitudes at depths isolated from the atmosphere. A realistic 4D...
Published in: | Ocean Dynamics |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.archives-ouvertes.fr/hal-00798761 https://doi.org/10.1007/s10236-011-0507-3 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Hasson, Audrey Koch-Larrouy, Ariane Morrow, Rosemary Juza, Mélanie Penduff, Thierry The origin and fate of mode water in the southern Pacific Ocean |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Understanding the origin and fate of mode and intermediate waters (MW) in the subtropical Pacific Ocean is critical for climate, as MW store and export a large volume of CO2, heat, nutrients and salinity to lower latitudes at depths isolated from the atmosphere. A realistic 4D simulation has been used to track and quantify the MW routes and their property characteristics at the last region of subduction. It also allows us to quantify the water transformation after subduction. The simulation has been compared to available observations using a collocation method that interpolated model data onto observations in time and space. The comprehensive comparisons gave us confidence in the model's capacity to reproduce MW characteristics. A quantitative Lagrangian analysis was performed on the model output to depict the origin, the fate and the route of MW circulating in the southern Pacific Ocean, selected in the density range of 26.8-27.4 kg m−3. We found 18 Sv of MW were transported northward in patches through the 42° S section, mostly between 200 and 800 m depth. Of this transport, 8 Sv enters the Pacific Ocean in the upper layer south of Tasmania and subducts in the Pacific. The remainder is not ventilated in the Pacific sector: 4 Sv is advected from the Indian Ocean south of Tasmania at intermediate depth and finally 6 Sv is part of an intermediate depth recirculation within the Pacific Ocean. Particles take up to 30 years to travel northward through our domain before crossing the 42° S section. Southward transport branches also exist: 3 Sv flows southward following the eastern New Zealand coast and then exits through Drake Passage. An additional 4 Sv passes southward in the Tasman Sea, following the eastern Tasmanian coast and enters the Indian Ocean south of Tasmania, as part of the Tasman Leakage. Four different formation sites have been identified, where the MW are last ventilated. These formation sites have different water masses with specific salinity ranges. A study on the evolution ... |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) |
format |
Article in Journal/Newspaper |
author |
Hasson, Audrey Koch-Larrouy, Ariane Morrow, Rosemary Juza, Mélanie Penduff, Thierry |
author_facet |
Hasson, Audrey Koch-Larrouy, Ariane Morrow, Rosemary Juza, Mélanie Penduff, Thierry |
author_sort |
Hasson, Audrey |
title |
The origin and fate of mode water in the southern Pacific Ocean |
title_short |
The origin and fate of mode water in the southern Pacific Ocean |
title_full |
The origin and fate of mode water in the southern Pacific Ocean |
title_fullStr |
The origin and fate of mode water in the southern Pacific Ocean |
title_full_unstemmed |
The origin and fate of mode water in the southern Pacific Ocean |
title_sort |
origin and fate of mode water in the southern pacific ocean |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00798761 https://doi.org/10.1007/s10236-011-0507-3 |
geographic |
Drake Passage Indian New Zealand Pacific |
geographic_facet |
Drake Passage Indian New Zealand Pacific |
genre |
Drake Passage |
genre_facet |
Drake Passage |
op_source |
ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://hal.archives-ouvertes.fr/hal-00798761 Ocean Dynamics, Springer Verlag, 2012, 62 (3), pp.335-354. ⟨10.1007/s10236-011-0507-3⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-011-0507-3 hal-00798761 https://hal.archives-ouvertes.fr/hal-00798761 doi:10.1007/s10236-011-0507-3 |
op_doi |
https://doi.org/10.1007/s10236-011-0507-3 |
container_title |
Ocean Dynamics |
container_volume |
62 |
container_issue |
3 |
container_start_page |
335 |
op_container_end_page |
354 |
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1766398252304826368 |
spelling |
ftccsdartic:oai:HAL:hal-00798761v1 2023-05-15T16:02:35+02:00 The origin and fate of mode water in the southern Pacific Ocean Hasson, Audrey Koch-Larrouy, Ariane Morrow, Rosemary Juza, Mélanie Penduff, Thierry Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) Department of Earth, Ocean and Atmospheric Science Tallahassee (FSU Florida State University Tallahassee (FSU) 2012-03-01 https://hal.archives-ouvertes.fr/hal-00798761 https://doi.org/10.1007/s10236-011-0507-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-011-0507-3 hal-00798761 https://hal.archives-ouvertes.fr/hal-00798761 doi:10.1007/s10236-011-0507-3 ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://hal.archives-ouvertes.fr/hal-00798761 Ocean Dynamics, Springer Verlag, 2012, 62 (3), pp.335-354. ⟨10.1007/s10236-011-0507-3⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.1007/s10236-011-0507-3 2021-10-24T15:18:55Z International audience Understanding the origin and fate of mode and intermediate waters (MW) in the subtropical Pacific Ocean is critical for climate, as MW store and export a large volume of CO2, heat, nutrients and salinity to lower latitudes at depths isolated from the atmosphere. A realistic 4D simulation has been used to track and quantify the MW routes and their property characteristics at the last region of subduction. It also allows us to quantify the water transformation after subduction. The simulation has been compared to available observations using a collocation method that interpolated model data onto observations in time and space. The comprehensive comparisons gave us confidence in the model's capacity to reproduce MW characteristics. A quantitative Lagrangian analysis was performed on the model output to depict the origin, the fate and the route of MW circulating in the southern Pacific Ocean, selected in the density range of 26.8-27.4 kg m−3. We found 18 Sv of MW were transported northward in patches through the 42° S section, mostly between 200 and 800 m depth. Of this transport, 8 Sv enters the Pacific Ocean in the upper layer south of Tasmania and subducts in the Pacific. The remainder is not ventilated in the Pacific sector: 4 Sv is advected from the Indian Ocean south of Tasmania at intermediate depth and finally 6 Sv is part of an intermediate depth recirculation within the Pacific Ocean. Particles take up to 30 years to travel northward through our domain before crossing the 42° S section. Southward transport branches also exist: 3 Sv flows southward following the eastern New Zealand coast and then exits through Drake Passage. An additional 4 Sv passes southward in the Tasman Sea, following the eastern Tasmanian coast and enters the Indian Ocean south of Tasmania, as part of the Tasman Leakage. Four different formation sites have been identified, where the MW are last ventilated. These formation sites have different water masses with specific salinity ranges. A study on the evolution ... Article in Journal/Newspaper Drake Passage Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Drake Passage Indian New Zealand Pacific Ocean Dynamics 62 3 335 354 |