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.archives-ouvertes.fr/hal-00183250 https://doi.org/10.1007/s10236-006-0069-y |
id |
ftccsdartic:oai:HAL:hal-00183250v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Oceanography Ocean model Climate variability North Atlantic Thermohaline circulation [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 |
Oceanography Ocean model Climate variability North Atlantic Thermohaline circulation [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 |
Oceanography Ocean model Climate variability North Atlantic Thermohaline circulation [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) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) 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) Leibniz Institute of Marine Science at the University of Kiel (IFM-GEOMAR) Kiel University |
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.archives-ouvertes.fr/hal-00183250 https://doi.org/10.1007/s10236-006-0069-y |
geographic |
Greenland |
geographic_facet |
Greenland |
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.archives-ouvertes.fr/hal-00183250 Ocean Dynamics, Springer Verlag, 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.archives-ouvertes.fr/hal-00183250 doi:10.1007/s10236-006-0069-y |
op_rights |
http://creativecommons.org/licenses/by/ |
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_ |
1766399545399312384 |
spelling |
ftccsdartic:oai:HAL:hal-00183250v1 2023-05-15T16:03:51+02:00 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) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) 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) Leibniz Institute of Marine Science at the University of Kiel (IFM-GEOMAR) Kiel University 2006 https://hal.archives-ouvertes.fr/hal-00183250 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.archives-ouvertes.fr/hal-00183250 doi:10.1007/s10236-006-0069-y http://creativecommons.org/licenses/by/ ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://hal.archives-ouvertes.fr/hal-00183250 Ocean Dynamics, Springer Verlag, 2006, 56, pp.568-580. ⟨10.1007/s10236-006-0069-y⟩ Oceanography Ocean model Climate variability North Atlantic Thermohaline circulation [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 ftccsdartic https://doi.org/10.1007/s10236-006-0069-y 2021-12-19T04:17:27Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Ocean Dynamics 56 5-6 568 580 |