Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean
International audience The causes and characteristics of interannual–decadal variability of the meridional overturning circulation (MOC) in the North Atlantic are investigated with a suite of basin-scale ocean models [the Family of Linked Atlantic Model Experiments (FLAME)] and global ocean–ice mode...
Published in: | Journal of Climate |
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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.science/hal-00769988 https://hal.science/hal-00769988/document https://hal.science/hal-00769988/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Causes%20of%20Interannual%E2%80%93Decadal%20Variability%20in%20the%20Meridional%20Overturning%20Circulation%20of%20the%20Midlatitude%20North%20Atlantic%20Ocean.pdf https://doi.org/10.1175/2008JCLI2404.1 |
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ftinsu:oai:HAL:hal-00769988v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
North Atlantic Ocean Meridional overturning circulation Decadal variability Interannual variability [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
North Atlantic Ocean Meridional overturning circulation Decadal variability Interannual variability [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Biastoch, Arne Böning, Claus W. Getzlaff, Julia Molines, Jean-Marc Madec, Gurvan Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
topic_facet |
North Atlantic Ocean Meridional overturning circulation Decadal variability Interannual variability [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience The causes and characteristics of interannual–decadal variability of the meridional overturning circulation (MOC) in the North Atlantic are investigated with a suite of basin-scale ocean models [the Family of Linked Atlantic Model Experiments (FLAME)] and global ocean–ice models (ORCA), varying in resolution from medium to eddy resolving (½°–1/12°), using various forcing configurations built on bulk formulations invoking atmospheric reanalysis products. Comparison of the model hindcasts indicates similar MOC variability characteristics on time scales up to a decade; both model architectures also simulate an upward trend in MOC strength between the early 1970s and mid-1990s. The causes of the MOC changes are examined by perturbation experiments aimed selectively at the response to individual forcing components. The solutions emphasize an inherently linear character of the midlatitude MOC variability by demonstrating that the anomalies of a (non–eddy resolving) hindcast simulation can be understood as a superposition of decadal and longer-term signals originating from thermohaline forcing variability, and a higher-frequency wind-driven variability. The thermohaline MOC signal is linked to the variability in subarctic deep-water formation, and rapidly progressing to the tropical Atlantic. However, throughout the subtropical and midlatitude North Atlantic, this signal is effectively masked by stronger MOC variability related to wind forcing and, especially north of 30°–35°N, by internally induced (eddy) fluctuations. |
author2 |
Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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-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)-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) |
format |
Article in Journal/Newspaper |
author |
Biastoch, Arne Böning, Claus W. Getzlaff, Julia Molines, Jean-Marc Madec, Gurvan |
author_facet |
Biastoch, Arne Böning, Claus W. Getzlaff, Julia Molines, Jean-Marc Madec, Gurvan |
author_sort |
Biastoch, Arne |
title |
Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
title_short |
Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
title_full |
Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
title_fullStr |
Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
title_full_unstemmed |
Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean |
title_sort |
causes of interannual-decadal variability in the meridional overturning circulation of the midlatitude north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00769988 https://hal.science/hal-00769988/document https://hal.science/hal-00769988/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Causes%20of%20Interannual%E2%80%93Decadal%20Variability%20in%20the%20Meridional%20Overturning%20Circulation%20of%20the%20Midlatitude%20North%20Atlantic%20Ocean.pdf https://doi.org/10.1175/2008JCLI2404.1 |
genre |
North Atlantic Orca Subarctic |
genre_facet |
North Atlantic Orca Subarctic |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-00769988 Journal of Climate, 2008, 21, pp.6599. ⟨10.1175/2008JCLI2404.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/2008JCLI2404.1 hal-00769988 https://hal.science/hal-00769988 https://hal.science/hal-00769988/document https://hal.science/hal-00769988/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Causes%20of%20Interannual%E2%80%93Decadal%20Variability%20in%20the%20Meridional%20Overturning%20Circulation%20of%20the%20Midlatitude%20North%20Atlantic%20Ocean.pdf BIBCODE: 2008JCli.21.6599B doi:10.1175/2008JCLI2404.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/2008JCLI2404.1 |
container_title |
Journal of Climate |
container_volume |
21 |
container_issue |
24 |
container_start_page |
6599 |
op_container_end_page |
6615 |
_version_ |
1797587878764609536 |
spelling |
ftinsu:oai:HAL:hal-00769988v1 2024-04-28T08:29:48+00:00 Causes of Interannual-Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean Biastoch, Arne Böning, Claus W. Getzlaff, Julia Molines, Jean-Marc Madec, Gurvan Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-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-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)-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) 2008 https://hal.science/hal-00769988 https://hal.science/hal-00769988/document https://hal.science/hal-00769988/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Causes%20of%20Interannual%E2%80%93Decadal%20Variability%20in%20the%20Meridional%20Overturning%20Circulation%20of%20the%20Midlatitude%20North%20Atlantic%20Ocean.pdf https://doi.org/10.1175/2008JCLI2404.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/2008JCLI2404.1 hal-00769988 https://hal.science/hal-00769988 https://hal.science/hal-00769988/document https://hal.science/hal-00769988/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Causes%20of%20Interannual%E2%80%93Decadal%20Variability%20in%20the%20Meridional%20Overturning%20Circulation%20of%20the%20Midlatitude%20North%20Atlantic%20Ocean.pdf BIBCODE: 2008JCli.21.6599B doi:10.1175/2008JCLI2404.1 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-00769988 Journal of Climate, 2008, 21, pp.6599. ⟨10.1175/2008JCLI2404.1⟩ North Atlantic Ocean Meridional overturning circulation Decadal variability Interannual variability [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2008 ftinsu https://doi.org/10.1175/2008JCLI2404.1 2024-04-05T00:37:03Z International audience The causes and characteristics of interannual–decadal variability of the meridional overturning circulation (MOC) in the North Atlantic are investigated with a suite of basin-scale ocean models [the Family of Linked Atlantic Model Experiments (FLAME)] and global ocean–ice models (ORCA), varying in resolution from medium to eddy resolving (½°–1/12°), using various forcing configurations built on bulk formulations invoking atmospheric reanalysis products. Comparison of the model hindcasts indicates similar MOC variability characteristics on time scales up to a decade; both model architectures also simulate an upward trend in MOC strength between the early 1970s and mid-1990s. The causes of the MOC changes are examined by perturbation experiments aimed selectively at the response to individual forcing components. The solutions emphasize an inherently linear character of the midlatitude MOC variability by demonstrating that the anomalies of a (non–eddy resolving) hindcast simulation can be understood as a superposition of decadal and longer-term signals originating from thermohaline forcing variability, and a higher-frequency wind-driven variability. The thermohaline MOC signal is linked to the variability in subarctic deep-water formation, and rapidly progressing to the tropical Atlantic. However, throughout the subtropical and midlatitude North Atlantic, this signal is effectively masked by stronger MOC variability related to wind forcing and, especially north of 30°–35°N, by internally induced (eddy) fluctuations. Article in Journal/Newspaper North Atlantic Orca Subarctic Institut national des sciences de l'Univers: HAL-INSU Journal of Climate 21 24 6599 6615 |