Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers
International audience The influence of Loire and Gironde River discharges over the sea surface temperature (SST) in the eastern Bay of Biscay (0.6º–36.6ºW, 44.2º–47.8ºW) was analyzed by means of two complementary databases (MODIS and OISST1/4). The area influenced by river plume showed a different...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.science/hal-04200763 https://hal.science/hal-04200763/document https://hal.science/hal-04200763/file/JGR%20Oceans%20-%202016%20-%20Costoya.pdf https://doi.org/10.1002/2015JC011157 |
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ftinsu:oai:HAL:hal-04200763v1 2024-04-14T08:15:41+00:00 Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers Costoya, X. Fernandez-Novoa, D. Decastro, M. Santos, F. Lazure, Pascal Gomez-Gesteira, M. Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2016-01 https://hal.science/hal-04200763 https://hal.science/hal-04200763/document https://hal.science/hal-04200763/file/JGR%20Oceans%20-%202016%20-%20Costoya.pdf https://doi.org/10.1002/2015JC011157 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1002/2015JC011157 hal-04200763 https://hal.science/hal-04200763 https://hal.science/hal-04200763/document https://hal.science/hal-04200763/file/JGR%20Oceans%20-%202016%20-%20Costoya.pdf doi:10.1002/2015JC011157 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-04200763 Journal of Geophysical Research. Oceans, 2016, 121 (1), pp.966-979. ⟨10.1002/2015JC011157⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1002/2015JC011157 2024-03-21T17:06:29Z International audience The influence of Loire and Gironde River discharges over the sea surface temperature (SST) in the eastern Bay of Biscay (0.6º–36.6ºW, 44.2º–47.8ºW) was analyzed by means of two complementary databases (MODIS and OISST1/4). The area influenced by river plume showed a different SST when compared with the adjacent oceanic area for the months when the plume attains its highest extension (December, January, and February). Ocean was observed to warm at a rate of approximately 0.3ºC dec−1 while temperature at the area influenced by the rivers cooled at a rate of −0.15ºC dec−1 over the period 1982–2014. The mere presence of a freshwater layer is able to modulate the warming observed at adjacent ocean locations since the coastal area is isolated from the rest of the Bay. This nearshore strip is the only part of the Bay where changes in SST depend on North Atlantic Oscillation (NAO) but not on North Atlantic SST represented by the Atlantic Multidecadal Oscillation (AMO). These different cooling-warming trends are even more patent over the last years (2002–2014) under atmospheric favorable conditions for plume enhancement. River runoff increased at a rate on the order of 120 m3s−1dec−1 over that period and southwesterly winds, which favor the confinement of the plume, showed a positive and significant trend both in duration and intensity. Thus, the coastal strip has been observed to cool at a rate of −0.5°C dec−1. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Oceans 121 1 966 979 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Costoya, X. Fernandez-Novoa, D. Decastro, M. Santos, F. Lazure, Pascal Gomez-Gesteira, M. Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The influence of Loire and Gironde River discharges over the sea surface temperature (SST) in the eastern Bay of Biscay (0.6º–36.6ºW, 44.2º–47.8ºW) was analyzed by means of two complementary databases (MODIS and OISST1/4). The area influenced by river plume showed a different SST when compared with the adjacent oceanic area for the months when the plume attains its highest extension (December, January, and February). Ocean was observed to warm at a rate of approximately 0.3ºC dec−1 while temperature at the area influenced by the rivers cooled at a rate of −0.15ºC dec−1 over the period 1982–2014. The mere presence of a freshwater layer is able to modulate the warming observed at adjacent ocean locations since the coastal area is isolated from the rest of the Bay. This nearshore strip is the only part of the Bay where changes in SST depend on North Atlantic Oscillation (NAO) but not on North Atlantic SST represented by the Atlantic Multidecadal Oscillation (AMO). These different cooling-warming trends are even more patent over the last years (2002–2014) under atmospheric favorable conditions for plume enhancement. River runoff increased at a rate on the order of 120 m3s−1dec−1 over that period and southwesterly winds, which favor the confinement of the plume, showed a positive and significant trend both in duration and intensity. Thus, the coastal strip has been observed to cool at a rate of −0.5°C dec−1. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Costoya, X. Fernandez-Novoa, D. Decastro, M. Santos, F. Lazure, Pascal Gomez-Gesteira, M. |
author_facet |
Costoya, X. Fernandez-Novoa, D. Decastro, M. Santos, F. Lazure, Pascal Gomez-Gesteira, M. |
author_sort |
Costoya, X. |
title |
Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
title_short |
Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
title_full |
Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
title_fullStr |
Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
title_full_unstemmed |
Modulation of sea surface temperature warming in the Bay of Biscay by Loire and Gironde Rivers |
title_sort |
modulation of sea surface temperature warming in the bay of biscay by loire and gironde rivers |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-04200763 https://hal.science/hal-04200763/document https://hal.science/hal-04200763/file/JGR%20Oceans%20-%202016%20-%20Costoya.pdf https://doi.org/10.1002/2015JC011157 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-04200763 Journal of Geophysical Research. Oceans, 2016, 121 (1), pp.966-979. ⟨10.1002/2015JC011157⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2015JC011157 hal-04200763 https://hal.science/hal-04200763 https://hal.science/hal-04200763/document https://hal.science/hal-04200763/file/JGR%20Oceans%20-%202016%20-%20Costoya.pdf doi:10.1002/2015JC011157 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2015JC011157 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
1 |
container_start_page |
966 |
op_container_end_page |
979 |
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1796314104629035008 |