Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning
International audience Mid-depth North Pacific waters are rich in nutrients and respired carbon accumulated over centuries. The rates and pathways with which these waters exchange with the surface ocean are uncertain, with divergent paradigms of the Pacific overturning: one envisions bottom waters u...
Published in: | Nature Communications |
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Main Authors: | , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349/document https://hal.sorbonne-universite.fr/hal-03290349/file/s41467-021-24648-x.pdf https://doi.org/10.1038/s41467-021-24648-x |
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ftccsdartic:oai:HAL:hal-03290349v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
Carbon cycle Physical oceanography [SDU]Sciences of the Universe [physics] |
spellingShingle |
Carbon cycle Physical oceanography [SDU]Sciences of the Universe [physics] Holzer, Mark DeVries, Tim de Lavergne, Casimir Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
topic_facet |
Carbon cycle Physical oceanography [SDU]Sciences of the Universe [physics] |
description |
International audience Mid-depth North Pacific waters are rich in nutrients and respired carbon accumulated over centuries. The rates and pathways with which these waters exchange with the surface ocean are uncertain, with divergent paradigms of the Pacific overturning: one envisions bottom waters upwelling to 1.5 km depth; the other confines overturning beneath a mid-depth Pacific shadow zone (PSZ) shielded from mean advection. Here global inverse modelling reveals a PSZ where mean ages exceed 1400 years with overturning beneath. The PSZ is supplied primarily by Antarctic and North-Atlantic ventilated waters diffusing from below and from the south. Half of PSZ waters re-surface in the Southern Ocean, a quarter in the subarctic Pacific. The abyssal North Pacific, despite strong overturning, has mean re-surfacing times also exceeding 1400 years because of diffusion into the overlying PSZ. These results imply that diffusive transportsdistinct from overturning transportsare a leading control on Pacific nutrient and carbon storage. |
author2 |
University of New South Wales Sydney (UNSW) University of California Santa Barbara (UCSB) University of California Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) European Project: 821001,SO-CHIC(2019) |
format |
Article in Journal/Newspaper |
author |
Holzer, Mark DeVries, Tim de Lavergne, Casimir |
author_facet |
Holzer, Mark DeVries, Tim de Lavergne, Casimir |
author_sort |
Holzer, Mark |
title |
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
title_short |
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
title_full |
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
title_fullStr |
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
title_full_unstemmed |
Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning |
title_sort |
diffusion controls the ventilation of a pacific shadow zone above abyssal overturning |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.sorbonne-universite.fr/hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349/document https://hal.sorbonne-universite.fr/hal-03290349/file/s41467-021-24648-x.pdf https://doi.org/10.1038/s41467-021-24648-x |
geographic |
Antarctic Pacific Southern Ocean |
geographic_facet |
Antarctic Pacific Southern Ocean |
genre |
Antarc* Antarctic North Atlantic Southern Ocean Subarctic |
genre_facet |
Antarc* Antarctic North Atlantic Southern Ocean Subarctic |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-03290349 Nature Communications, Nature Publishing Group, 2021, 12 (1), pp.4348. ⟨10.1038/s41467-021-24648-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-021-24648-x info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349/document https://hal.sorbonne-universite.fr/hal-03290349/file/s41467-021-24648-x.pdf doi:10.1038/s41467-021-24648-x WOS: 000677489800001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41467-021-24648-x |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766016465136254976 |
spelling |
ftccsdartic:oai:HAL:hal-03290349v1 2023-05-15T13:31:10+02:00 Diffusion controls the ventilation of a Pacific Shadow Zone above abyssal overturning Holzer, Mark DeVries, Tim de Lavergne, Casimir University of New South Wales Sydney (UNSW) University of California Santa Barbara (UCSB) University of California Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) European Project: 821001,SO-CHIC(2019) 2021-07-16 https://hal.sorbonne-universite.fr/hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349/document https://hal.sorbonne-universite.fr/hal-03290349/file/s41467-021-24648-x.pdf https://doi.org/10.1038/s41467-021-24648-x en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-021-24648-x info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349 https://hal.sorbonne-universite.fr/hal-03290349/document https://hal.sorbonne-universite.fr/hal-03290349/file/s41467-021-24648-x.pdf doi:10.1038/s41467-021-24648-x WOS: 000677489800001 info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-03290349 Nature Communications, Nature Publishing Group, 2021, 12 (1), pp.4348. ⟨10.1038/s41467-021-24648-x⟩ Carbon cycle Physical oceanography [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1038/s41467-021-24648-x 2022-01-09T00:16:46Z International audience Mid-depth North Pacific waters are rich in nutrients and respired carbon accumulated over centuries. The rates and pathways with which these waters exchange with the surface ocean are uncertain, with divergent paradigms of the Pacific overturning: one envisions bottom waters upwelling to 1.5 km depth; the other confines overturning beneath a mid-depth Pacific shadow zone (PSZ) shielded from mean advection. Here global inverse modelling reveals a PSZ where mean ages exceed 1400 years with overturning beneath. The PSZ is supplied primarily by Antarctic and North-Atlantic ventilated waters diffusing from below and from the south. Half of PSZ waters re-surface in the Southern Ocean, a quarter in the subarctic Pacific. The abyssal North Pacific, despite strong overturning, has mean re-surfacing times also exceeding 1400 years because of diffusion into the overlying PSZ. These results imply that diffusive transportsdistinct from overturning transportsare a leading control on Pacific nutrient and carbon storage. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Southern Ocean Subarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Pacific Southern Ocean Nature Communications 12 1 |