Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean

International audience The seasonal variability of the surface horizontal thermohaline structure is investigated in the north-eastern Atlantic Surface Salinity Maximum (SSM) at length scales from five to hundreds of kilometers, i.e., at submesoscale to mesoscale. The near-surface temperature and sal...

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Published in:Journal of Geophysical Research: Oceans
Main Authors: Kolodziejczyk, Nicolas, N., Reverdin, Gilles, Boutin, Jacqueline, Hernandez, Olga
Other Authors: 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), Interactions et Processus au sein de la couche de Surface Océanique (IPSO), 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)-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)), ANR-10-EQPX-0040,NAOS,Observations de l'océan global pour l'étude et la prévision de l'océan et du climat: préparation de la nouvelle décennie d'Argo(2010)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2015
Subjects:
Online Access:https://hal.science/hal-01233659
https://hal.science/hal-01233659/document
https://hal.science/hal-01233659/file/JGR%20Oceans%20-%202015%20-%20Kolodziejczyk%20-%20Observation%20of%20the%20surface%20horizontal%20thermohaline%20variability%20at%20mesoscale%20to.pdf
https://doi.org/10.1002/2014JC010455
id ftceafr:oai:HAL:hal-01233659v1
record_format openpolar
institution Open Polar
collection HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
op_collection_id ftceafr
language English
topic surface thermohaline variability
density-compensation
QG turbulence
subtropical North Atlantic
mesoscale to submesoscale
in situ observations
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
spellingShingle surface thermohaline variability
density-compensation
QG turbulence
subtropical North Atlantic
mesoscale to submesoscale
in situ observations
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
Kolodziejczyk, Nicolas, N.
Reverdin, Gilles
Boutin, Jacqueline
Hernandez, Olga
Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
topic_facet surface thermohaline variability
density-compensation
QG turbulence
subtropical North Atlantic
mesoscale to submesoscale
in situ observations
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]
description International audience The seasonal variability of the surface horizontal thermohaline structure is investigated in the north-eastern Atlantic Surface Salinity Maximum (SSM) at length scales from five to hundreds of kilometers, i.e., at submesoscale to mesoscale. The near-surface temperature and salinity data from merchant ship thermosalinograph (TSG) transects across the Atlantic are used to compute the horizontal temperature, salinity and density fluctuations, and the density ratio. During late winter in the north-eastern SSM, thermohaline compensation is observed for wavelengths from 5 km to more than 200 km; in spite of large and sharp surface thermohaline fronts, a weak density surface horizontal gradient is observed. Temperature and salinity exhibit an energetic spectra in k−2 slope scale between 20–100 km scale and a steeper slope at shorter wavelengths, while density spectra exhibit lower energy level with a clear k−3 slope below 20 km, consistent with interior quasigeostrophic turbulence. During summer in the north-eastern SSM, salinity and temperature gradients are no longer compensated due to strong atmospheric heating of the upper ocean. In comparison with winter, the surface density spectrum is enhanced with a flatter slope between k−2 and k−1 between 5 and 20 km.
author2 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)
Interactions et Processus au sein de la couche de Surface Océanique (IPSO)
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)-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))
ANR-10-EQPX-0040,NAOS,Observations de l'océan global pour l'étude et la prévision de l'océan et du climat: préparation de la nouvelle décennie d'Argo(2010)
format Article in Journal/Newspaper
author Kolodziejczyk, Nicolas, N.
Reverdin, Gilles
Boutin, Jacqueline
Hernandez, Olga
author_facet Kolodziejczyk, Nicolas, N.
Reverdin, Gilles
Boutin, Jacqueline
Hernandez, Olga
author_sort Kolodziejczyk, Nicolas, N.
title Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
title_short Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
title_full Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
title_fullStr Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
title_full_unstemmed Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean
title_sort observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical atlantic ocean
publisher HAL CCSD
publishDate 2015
url https://hal.science/hal-01233659
https://hal.science/hal-01233659/document
https://hal.science/hal-01233659/file/JGR%20Oceans%20-%202015%20-%20Kolodziejczyk%20-%20Observation%20of%20the%20surface%20horizontal%20thermohaline%20variability%20at%20mesoscale%20to.pdf
https://doi.org/10.1002/2014JC010455
genre North Atlantic
genre_facet North Atlantic
op_source ISSN: 2169-9275
EISSN: 2169-9291
Journal of Geophysical Research. Oceans
https://hal.science/hal-01233659
Journal of Geophysical Research. Oceans, 2015, 120 (4), pp.2588-2600. ⟨10.1002/2014JC010455⟩
http://onlinelibrary.wiley.com/doi/10.1002/2014JC010455/full
op_relation info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JC010455
hal-01233659
https://hal.science/hal-01233659
https://hal.science/hal-01233659/document
https://hal.science/hal-01233659/file/JGR%20Oceans%20-%202015%20-%20Kolodziejczyk%20-%20Observation%20of%20the%20surface%20horizontal%20thermohaline%20variability%20at%20mesoscale%20to.pdf
doi:10.1002/2014JC010455
WOS: 000354417200012
op_rights http://hal.archives-ouvertes.fr/licences/copyright/
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op_doi https://doi.org/10.1002/2014JC01045510.1002/2014JC010455/full
container_title Journal of Geophysical Research: Oceans
container_volume 120
container_issue 4
container_start_page 2588
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spelling ftceafr:oai:HAL:hal-01233659v1 2024-09-15T18:23:41+00:00 Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean Kolodziejczyk, Nicolas, N. Reverdin, Gilles Boutin, Jacqueline Hernandez, Olga 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) Interactions et Processus au sein de la couche de Surface Océanique (IPSO) 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)-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)) ANR-10-EQPX-0040,NAOS,Observations de l'océan global pour l'étude et la prévision de l'océan et du climat: préparation de la nouvelle décennie d'Argo(2010) 2015-04 https://hal.science/hal-01233659 https://hal.science/hal-01233659/document https://hal.science/hal-01233659/file/JGR%20Oceans%20-%202015%20-%20Kolodziejczyk%20-%20Observation%20of%20the%20surface%20horizontal%20thermohaline%20variability%20at%20mesoscale%20to.pdf https://doi.org/10.1002/2014JC010455 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2014JC010455 hal-01233659 https://hal.science/hal-01233659 https://hal.science/hal-01233659/document https://hal.science/hal-01233659/file/JGR%20Oceans%20-%202015%20-%20Kolodziejczyk%20-%20Observation%20of%20the%20surface%20horizontal%20thermohaline%20variability%20at%20mesoscale%20to.pdf doi:10.1002/2014JC010455 WOS: 000354417200012 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-01233659 Journal of Geophysical Research. Oceans, 2015, 120 (4), pp.2588-2600. ⟨10.1002/2014JC010455⟩ http://onlinelibrary.wiley.com/doi/10.1002/2014JC010455/full surface thermohaline variability density-compensation QG turbulence subtropical North Atlantic mesoscale to submesoscale in situ observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2015 ftceafr https://doi.org/10.1002/2014JC01045510.1002/2014JC010455/full 2024-07-22T13:13:09Z International audience The seasonal variability of the surface horizontal thermohaline structure is investigated in the north-eastern Atlantic Surface Salinity Maximum (SSM) at length scales from five to hundreds of kilometers, i.e., at submesoscale to mesoscale. The near-surface temperature and salinity data from merchant ship thermosalinograph (TSG) transects across the Atlantic are used to compute the horizontal temperature, salinity and density fluctuations, and the density ratio. During late winter in the north-eastern SSM, thermohaline compensation is observed for wavelengths from 5 km to more than 200 km; in spite of large and sharp surface thermohaline fronts, a weak density surface horizontal gradient is observed. Temperature and salinity exhibit an energetic spectra in k−2 slope scale between 20–100 km scale and a steeper slope at shorter wavelengths, while density spectra exhibit lower energy level with a clear k−3 slope below 20 km, consistent with interior quasigeostrophic turbulence. During summer in the north-eastern SSM, salinity and temperature gradients are no longer compensated due to strong atmospheric heating of the upper ocean. In comparison with winter, the surface density spectrum is enhanced with a flatter slope between k−2 and k−1 between 5 and 20 km. Article in Journal/Newspaper North Atlantic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Geophysical Research: Oceans 120 4 2588 2600