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...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01233659 https://hal.archives-ouvertes.fr/hal-01233659/document https://hal.archives-ouvertes.fr/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 |
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ftccsdartic:oai:HAL:hal-01233659v1 |
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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 |
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, 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) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-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 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)-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)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) |
format |
Article in Journal/Newspaper |
author |
Kolodziejczyk, Nicolas, Reverdin, Gilles Boutin, Jacqueline Hernandez, Olga |
author_facet |
Kolodziejczyk, Nicolas, Reverdin, Gilles Boutin, Jacqueline Hernandez, Olga |
author_sort |
Kolodziejczyk, Nicolas, |
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.archives-ouvertes.fr/hal-01233659 https://hal.archives-ouvertes.fr/hal-01233659/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-01233659 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 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.archives-ouvertes.fr/hal-01233659 https://hal.archives-ouvertes.fr/hal-01233659/document https://hal.archives-ouvertes.fr/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/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2014JC010455 https://doi.org/10.1002/2014JC010455/full |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2588 |
op_container_end_page |
2600 |
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1766132748414615552 |
spelling |
ftccsdartic:oai:HAL:hal-01233659v1 2023-05-15T17:34:03+02:00 Observation of the surface horizontal thermohaline variability at mesoscale to submesoscale in the north-eastern subtropical Atlantic Ocean Kolodziejczyk, Nicolas, Reverdin, Gilles Boutin, Jacqueline Hernandez, Olga Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-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 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)-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)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 2015-04 https://hal.archives-ouvertes.fr/hal-01233659 https://hal.archives-ouvertes.fr/hal-01233659/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-01233659 https://hal.archives-ouvertes.fr/hal-01233659/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-01233659 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 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 ftccsdartic https://doi.org/10.1002/2014JC010455 https://doi.org/10.1002/2014JC010455/full 2022-01-08T23:24:54Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Geophysical Research: Oceans 120 4 2588 2600 |