Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model
Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv o...
Published in: | Ocean Dynamics |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
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Subjects: | |
Online Access: | https://hal.science/hal-00183250 https://hal.science/hal-00183250/document https://hal.science/hal-00183250/file/publication-2199.pdf https://doi.org/10.1007/s10236-006-0069-y |
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ftunivparis:oai:HAL:hal-00183250v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
Climate variability North Atlantic Thermohaline circulation Ocean model Oceanography [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
spellingShingle |
Climate variability North Atlantic Thermohaline circulation Ocean model Oceanography [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Tréguier, Anne-Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herlé Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Böning, Claus W. Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
topic_facet |
Climate variability North Atlantic Thermohaline circulation Ocean model Oceanography [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
description |
Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv of difference in overturning (the precise value is model-dependent). Models show a decrease in the overturning circulation between 1997 and 2002, with different amplitudes. The CLIPPER ATL6 model reproduces well the observed weakening of the overturning in density coordinates between the cruises; in the model, the change is due to the combination of interannual and high-frequency forcing and internal variability associated with eddies and meanders. Examination of the z-coordinate overturning reveals model–data discrepancies: the vertical structure in the models does not change as much as the observed one. The East Greenland current variability is mainly wind-forced in the ATL6 model, while fluctuations due to eddies and instabilities explain a large part of the North Atlantic Current variability. The time-residual transport of dense water and heat due to eddy correlations between currents and properties is small across this section, which is normal to the direction of the main current. |
author2 |
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) 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) Leibniz Institute of Marine Science at the University of Kiel (IFM-GEOMAR) Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) |
format |
Article in Journal/Newspaper |
author |
Tréguier, Anne-Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herlé Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Böning, Claus W. |
author_facet |
Tréguier, Anne-Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herlé Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Böning, Claus W. |
author_sort |
Tréguier, Anne-Marie |
title |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_short |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_full |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_fullStr |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_full_unstemmed |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_sort |
internal and forced variability along a section between greenland and portugal in the clipper atlantic model |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00183250 https://hal.science/hal-00183250/document https://hal.science/hal-00183250/file/publication-2199.pdf https://doi.org/10.1007/s10236-006-0069-y |
genre |
East Greenland east greenland current Greenland north atlantic current North Atlantic North atlantic Thermohaline circulation |
genre_facet |
East Greenland east greenland current Greenland north atlantic current North Atlantic North atlantic Thermohaline circulation |
op_source |
ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://hal.science/hal-00183250 Ocean Dynamics, 2006, 56, pp.568-580. ⟨10.1007/s10236-006-0069-y⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-006-0069-y hal-00183250 https://hal.science/hal-00183250 https://hal.science/hal-00183250/document https://hal.science/hal-00183250/file/publication-2199.pdf doi:10.1007/s10236-006-0069-y WOS: WOS:000243189900015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s10236-006-0069-y |
container_title |
Ocean Dynamics |
container_volume |
56 |
container_issue |
5-6 |
container_start_page |
568 |
op_container_end_page |
580 |
_version_ |
1799479190120038400 |
spelling |
ftunivparis:oai:HAL:hal-00183250v1 2024-05-19T07:39:37+00:00 Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model Tréguier, Anne-Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herlé Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Böning, Claus W. 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) 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) Leibniz Institute of Marine Science at the University of Kiel (IFM-GEOMAR) Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) 2006 https://hal.science/hal-00183250 https://hal.science/hal-00183250/document https://hal.science/hal-00183250/file/publication-2199.pdf https://doi.org/10.1007/s10236-006-0069-y en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-006-0069-y hal-00183250 https://hal.science/hal-00183250 https://hal.science/hal-00183250/document https://hal.science/hal-00183250/file/publication-2199.pdf doi:10.1007/s10236-006-0069-y WOS: WOS:000243189900015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://hal.science/hal-00183250 Ocean Dynamics, 2006, 56, pp.568-580. ⟨10.1007/s10236-006-0069-y⟩ Climate variability North Atlantic Thermohaline circulation Ocean model Oceanography [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] info:eu-repo/semantics/article Journal articles 2006 ftunivparis https://doi.org/10.1007/s10236-006-0069-y 2024-04-23T03:33:42Z Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv of difference in overturning (the precise value is model-dependent). Models show a decrease in the overturning circulation between 1997 and 2002, with different amplitudes. The CLIPPER ATL6 model reproduces well the observed weakening of the overturning in density coordinates between the cruises; in the model, the change is due to the combination of interannual and high-frequency forcing and internal variability associated with eddies and meanders. Examination of the z-coordinate overturning reveals model–data discrepancies: the vertical structure in the models does not change as much as the observed one. The East Greenland current variability is mainly wind-forced in the ATL6 model, while fluctuations due to eddies and instabilities explain a large part of the North Atlantic Current variability. The time-residual transport of dense water and heat due to eddy correlations between currents and properties is small across this section, which is normal to the direction of the main current. Article in Journal/Newspaper East Greenland east greenland current Greenland north atlantic current North Atlantic North atlantic Thermohaline circulation Université de Paris: Portail HAL Ocean Dynamics 56 5-6 568 580 |