Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses
International audience The West Spitsbergen Current (WSC) cools and freshens as it flows northward along the western Svalbard shelf. The cooling takes place at the ocean surface through interaction with the atmosphere and also in subsurface. We present observations with high horizontal resolution (a...
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
2018
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Subjects: | |
Online Access: | https://hal.science/hal-02190731 https://hal.science/hal-02190731/document https://hal.science/hal-02190731/file/JGR%20Oceans%20-%202018%20-%20Koenig%20-%20Cooling%20and%20Freshening%20of%20the%20West%20Spitsbergen%20Current%20by%20Shelf%25u2010Origin%20Cold%20Core%20Lenses.pdf https://doi.org/10.1029/2018JC014463 |
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Open Polar |
collection |
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Koenig, Zoé Meyer, Amelie Provost, Christine Sennéchael, Nathalie Sundfjord, Arild Béguery, Laurent Athanase, Marylou Gascard, Jean-Claude Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
topic_facet |
[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience The West Spitsbergen Current (WSC) cools and freshens as it flows northward along the western Svalbard shelf. The cooling takes place at the ocean surface through interaction with the atmosphere and also in subsurface. We present observations with high horizontal resolution (around 2 km)from a SeaExplorer glider deployed in July 2017 for 14 days in the WSC offshore Kongsfjorden around 79°N.They document small lenses (less than 10-km diameter) of cold (less than 3.8 °C) and fresh (less than35.2 g/kg) waters in the core of the WSC, coming from the shelf and contributing to its cooling and freshening. Data show that water from the shelf cascades to the bottom of the slope and then detaches on the offshore side of the WSC core where it is baroclinically unstable. The presence of these lenses from the shelf can be related to the wind regime. Strong southerly winds cause upwelling of the warm Atlantic Water onto the shelf in winter. Weak and/or northerly winds allow modified Atlantic Water formed by mixing with cold waters on the shelf to cascade down the slope, leading to lenses of colder and fresher water protruding into the WSC. If lenses are common in the WSC, they could be contributing significantly to its cooling and freshening especially in summer when the influence of the atmosphere on the cooling of the WSC is less important. |
author2 |
Austral, Boréal et Carbone (ABC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Norwegian Polar Institute Alcen SEAMAR (Alcen) (ALSEAMAR) |
format |
Article in Journal/Newspaper |
author |
Koenig, Zoé Meyer, Amelie Provost, Christine Sennéchael, Nathalie Sundfjord, Arild Béguery, Laurent Athanase, Marylou Gascard, Jean-Claude |
author_facet |
Koenig, Zoé Meyer, Amelie Provost, Christine Sennéchael, Nathalie Sundfjord, Arild Béguery, Laurent Athanase, Marylou Gascard, Jean-Claude |
author_sort |
Koenig, Zoé |
title |
Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
title_short |
Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
title_full |
Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
title_fullStr |
Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
title_full_unstemmed |
Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses |
title_sort |
cooling and freshening of the west spitsbergen current by shelf-origin cold core lenses |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02190731 https://hal.science/hal-02190731/document https://hal.science/hal-02190731/file/JGR%20Oceans%20-%202018%20-%20Koenig%20-%20Cooling%20and%20Freshening%20of%20the%20West%20Spitsbergen%20Current%20by%20Shelf%25u2010Origin%20Cold%20Core%20Lenses.pdf https://doi.org/10.1029/2018JC014463 |
genre |
Kongsfjord* Kongsfjorden Svalbard Spitsbergen |
genre_facet |
Kongsfjord* Kongsfjorden Svalbard Spitsbergen |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-02190731 Journal of Geophysical Research. Oceans, 2018, 123 (11), pp.8299-8312. ⟨10.1029/2018JC014463⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JC014463 hal-02190731 https://hal.science/hal-02190731 https://hal.science/hal-02190731/document https://hal.science/hal-02190731/file/JGR%20Oceans%20-%202018%20-%20Koenig%20-%20Cooling%20and%20Freshening%20of%20the%20West%20Spitsbergen%20Current%20by%20Shelf%25u2010Origin%20Cold%20Core%20Lenses.pdf doi:10.1029/2018JC014463 WOS: 000453907000034 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JC014463 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
11 |
container_start_page |
8299 |
op_container_end_page |
8312 |
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1799483275589189632 |
spelling |
ftceafr:oai:HAL:hal-02190731v1 2024-05-19T07:43:33+00:00 Cooling and freshening of the West Spitsbergen Current by shelf-origin cold core lenses Koenig, Zoé Meyer, Amelie Provost, Christine Sennéchael, Nathalie Sundfjord, Arild Béguery, Laurent Athanase, Marylou Gascard, Jean-Claude Austral, Boréal et Carbone (ABC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Norwegian Polar Institute Alcen SEAMAR (Alcen) (ALSEAMAR) 2018-11 https://hal.science/hal-02190731 https://hal.science/hal-02190731/document https://hal.science/hal-02190731/file/JGR%20Oceans%20-%202018%20-%20Koenig%20-%20Cooling%20and%20Freshening%20of%20the%20West%20Spitsbergen%20Current%20by%20Shelf%25u2010Origin%20Cold%20Core%20Lenses.pdf https://doi.org/10.1029/2018JC014463 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JC014463 hal-02190731 https://hal.science/hal-02190731 https://hal.science/hal-02190731/document https://hal.science/hal-02190731/file/JGR%20Oceans%20-%202018%20-%20Koenig%20-%20Cooling%20and%20Freshening%20of%20the%20West%20Spitsbergen%20Current%20by%20Shelf%25u2010Origin%20Cold%20Core%20Lenses.pdf doi:10.1029/2018JC014463 WOS: 000453907000034 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-02190731 Journal of Geophysical Research. Oceans, 2018, 123 (11), pp.8299-8312. ⟨10.1029/2018JC014463⟩ [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2018 ftceafr https://doi.org/10.1029/2018JC014463 2024-04-25T01:39:35Z International audience The West Spitsbergen Current (WSC) cools and freshens as it flows northward along the western Svalbard shelf. The cooling takes place at the ocean surface through interaction with the atmosphere and also in subsurface. We present observations with high horizontal resolution (around 2 km)from a SeaExplorer glider deployed in July 2017 for 14 days in the WSC offshore Kongsfjorden around 79°N.They document small lenses (less than 10-km diameter) of cold (less than 3.8 °C) and fresh (less than35.2 g/kg) waters in the core of the WSC, coming from the shelf and contributing to its cooling and freshening. Data show that water from the shelf cascades to the bottom of the slope and then detaches on the offshore side of the WSC core where it is baroclinically unstable. The presence of these lenses from the shelf can be related to the wind regime. Strong southerly winds cause upwelling of the warm Atlantic Water onto the shelf in winter. Weak and/or northerly winds allow modified Atlantic Water formed by mixing with cold waters on the shelf to cascade down the slope, leading to lenses of colder and fresher water protruding into the WSC. If lenses are common in the WSC, they could be contributing significantly to its cooling and freshening especially in summer when the influence of the atmosphere on the cooling of the WSC is less important. Article in Journal/Newspaper Kongsfjord* Kongsfjorden Svalbard Spitsbergen HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Geophysical Research: Oceans 123 11 8299 8312 |