Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation
International audience Diapycnal mixing shapes the distribution of climatically important tracers, such as heat and carbon, as these are carried by dense water masses in the ocean interior. Here, we analyze a suite of observation-based estimates of diapycnal mixing to assess its role within the Atla...
Published in: | AGU Advances |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Online Access: | https://insu.hal.science/insu-04139563 https://insu.hal.science/insu-04139563/document https://insu.hal.science/insu-04139563/file/AGU%20Advances%20-%202023%20-%20Cimoli%20-%20Significance%20of%20Diapycnal%20Mixing%20Within%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022AV000800 |
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ftsorbonneuniv:oai:HAL:insu-04139563v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
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ftsorbonneuniv |
language |
English |
topic |
diapycnal mixing Atlantic Ocean tracer ventilation [SDU]Sciences of the Universe [physics] |
spellingShingle |
diapycnal mixing Atlantic Ocean tracer ventilation [SDU]Sciences of the Universe [physics] Cimoli, Laura Mashayek, Ali Johnson, Helen L. Marshall, David P. Naveira Garabato, Alberto C. Whalen, Caitlin B. Vic, Clément de Lavergne, Casimir Alford, Matthew H. Mackinnon, Jennifer A. Talley, Lynne D. Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
topic_facet |
diapycnal mixing Atlantic Ocean tracer ventilation [SDU]Sciences of the Universe [physics] |
description |
International audience Diapycnal mixing shapes the distribution of climatically important tracers, such as heat and carbon, as these are carried by dense water masses in the ocean interior. Here, we analyze a suite of observation-based estimates of diapycnal mixing to assess its role within the Atlantic Meridional Overturning Circulation (AMOC). The rate of water mass transformation in the Atlantic Ocean's interior shows that there is a robust buoyancy increase in the North Atlantic Deep Water (NADW, neutral density γ n ≃ 27.6-28.15), with a diapycnal circulation of 0.5-8 Sv between 48°N and 32°S in the Atlantic Ocean. Moreover, tracers within the southward-flowing NADW may undergo a substantial diapycnal transfer, equivalent to a vertical displacement of hundreds of meters in the vertical. This result, confirmed with a zonally averaged numerical model of the AMOC, indicates that mixing can alter where tracers upwell in the Southern Ocean, ultimately affecting their global pathways and ventilation timescales. These results point to the need for a realistic mixing representation in climate models in order to understand and credibly project the ongoing climate change. |
author2 |
Department of Applied Mathematics and Theoretical Physics (DAMTP) University of Cambridge UK (CAM) Scripps Institution of Oceanography (SIO - UC San Diego) University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) Department of Physics Oxford University of Oxford Department of Earth Sciences Cambridge, UK Department of Physics, University of Oxford, Keble Road, Oxford, OX1 3RH, UK University of Southampton Applied Physics Laboratory Seattle (APL-UW) University of Washington Seattle Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) 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 Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
format |
Article in Journal/Newspaper |
author |
Cimoli, Laura Mashayek, Ali Johnson, Helen L. Marshall, David P. Naveira Garabato, Alberto C. Whalen, Caitlin B. Vic, Clément de Lavergne, Casimir Alford, Matthew H. Mackinnon, Jennifer A. Talley, Lynne D. |
author_facet |
Cimoli, Laura Mashayek, Ali Johnson, Helen L. Marshall, David P. Naveira Garabato, Alberto C. Whalen, Caitlin B. Vic, Clément de Lavergne, Casimir Alford, Matthew H. Mackinnon, Jennifer A. Talley, Lynne D. |
author_sort |
Cimoli, Laura |
title |
Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
title_short |
Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
title_full |
Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
title_fullStr |
Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
title_full_unstemmed |
Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation |
title_sort |
significance of diapycnal mixing within the atlantic meridional overturning circulation |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04139563 https://insu.hal.science/insu-04139563/document https://insu.hal.science/insu-04139563/file/AGU%20Advances%20-%202023%20-%20Cimoli%20-%20Significance%20of%20Diapycnal%20Mixing%20Within%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022AV000800 |
genre |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
ISSN: 2576-604X EISSN: 2576-604X AGU Advances https://insu.hal.science/insu-04139563 AGU Advances, 2023, 4, ⟨10.1029/2022AV000800⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022AV000800 insu-04139563 https://insu.hal.science/insu-04139563 https://insu.hal.science/insu-04139563/document https://insu.hal.science/insu-04139563/file/AGU%20Advances%20-%202023%20-%20Cimoli%20-%20Significance%20of%20Diapycnal%20Mixing%20Within%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf BIBCODE: 2023AGUA.400800C doi:10.1029/2022AV000800 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2022AV000800 |
container_title |
AGU Advances |
container_volume |
4 |
container_issue |
2 |
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1799483860945207296 |
spelling |
ftsorbonneuniv:oai:HAL:insu-04139563v1 2024-05-19T07:44:06+00:00 Significance of Diapycnal Mixing Within the Atlantic Meridional Overturning Circulation Cimoli, Laura Mashayek, Ali Johnson, Helen L. Marshall, David P. Naveira Garabato, Alberto C. Whalen, Caitlin B. Vic, Clément de Lavergne, Casimir Alford, Matthew H. Mackinnon, Jennifer A. Talley, Lynne D. Department of Applied Mathematics and Theoretical Physics (DAMTP) University of Cambridge UK (CAM) Scripps Institution of Oceanography (SIO - UC San Diego) University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) Department of Physics Oxford University of Oxford Department of Earth Sciences Cambridge, UK Department of Physics, University of Oxford, Keble Road, Oxford, OX1 3RH, UK University of Southampton Applied Physics Laboratory Seattle (APL-UW) University of Washington Seattle Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) 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 Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 2023 https://insu.hal.science/insu-04139563 https://insu.hal.science/insu-04139563/document https://insu.hal.science/insu-04139563/file/AGU%20Advances%20-%202023%20-%20Cimoli%20-%20Significance%20of%20Diapycnal%20Mixing%20Within%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022AV000800 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1029/2022AV000800 insu-04139563 https://insu.hal.science/insu-04139563 https://insu.hal.science/insu-04139563/document https://insu.hal.science/insu-04139563/file/AGU%20Advances%20-%202023%20-%20Cimoli%20-%20Significance%20of%20Diapycnal%20Mixing%20Within%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf BIBCODE: 2023AGUA.400800C doi:10.1029/2022AV000800 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2576-604X EISSN: 2576-604X AGU Advances https://insu.hal.science/insu-04139563 AGU Advances, 2023, 4, ⟨10.1029/2022AV000800⟩ diapycnal mixing Atlantic Ocean tracer ventilation [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftsorbonneuniv https://doi.org/10.1029/2022AV000800 2024-04-25T03:46:07Z International audience Diapycnal mixing shapes the distribution of climatically important tracers, such as heat and carbon, as these are carried by dense water masses in the ocean interior. Here, we analyze a suite of observation-based estimates of diapycnal mixing to assess its role within the Atlantic Meridional Overturning Circulation (AMOC). The rate of water mass transformation in the Atlantic Ocean's interior shows that there is a robust buoyancy increase in the North Atlantic Deep Water (NADW, neutral density γ n ≃ 27.6-28.15), with a diapycnal circulation of 0.5-8 Sv between 48°N and 32°S in the Atlantic Ocean. Moreover, tracers within the southward-flowing NADW may undergo a substantial diapycnal transfer, equivalent to a vertical displacement of hundreds of meters in the vertical. This result, confirmed with a zonally averaged numerical model of the AMOC, indicates that mixing can alter where tracers upwell in the Southern Ocean, ultimately affecting their global pathways and ventilation timescales. These results point to the need for a realistic mixing representation in climate models in order to understand and credibly project the ongoing climate change. Article in Journal/Newspaper NADW North Atlantic Deep Water North Atlantic Southern Ocean HAL Sorbonne Université AGU Advances 4 2 |