Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007
International audience Unusually warm and saline near-surface inflow was observed in the southern Bay of Biscay (Northeast Atlantic) in autumn–winter 2006–2007. These anomalies were swiftly entraine deast ward through the Iberian Poleward Current flowing over the slope and shelf. Here, we present a...
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ftunivbrest:oai:HAL:hal-00385168v1 2023-12-17T10:47:22+01:00 Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 Le Cann, Bernard Serpette, Alain 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) Centre Militaire d'Océanographie EPSHOM 2009 https://hal.science/hal-00385168 https://doi.org/10.1016/j.csr.2008.11.015 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.csr.2008.11.015 hal-00385168 https://hal.science/hal-00385168 doi:10.1016/j.csr.2008.11.015 ISSN: 0278-4343 EISSN: 1873-6955 Continental Shelf Research https://hal.science/hal-00385168 Continental Shelf Research, 2009, 29 (8), pp.1014-1025. ⟨10.1016/j.csr.2008.11.015⟩ Slope and shelf currents Wind forcing Eastern boundary currents Climate and interannual variability Hydrography Bay of Biscay (NortheasternAtlantic) [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftunivbrest https://doi.org/10.1016/j.csr.2008.11.015 2023-11-21T23:38:47Z International audience Unusually warm and saline near-surface inflow was observed in the southern Bay of Biscay (Northeast Atlantic) in autumn–winter 2006–2007. These anomalies were swiftly entraine deast ward through the Iberian Poleward Current flowing over the slope and shelf. Here, we present a quasi-synoptic three dimensional view of this event, which started as early as August 2006. In situ hydrological and Lagrangian measurements were used to describe its characteristics. The warm anomaly was surface intensified over the shelf, with surface temperature above 17 °C, a monthly anomaly over 1 °C compared to the 1994–2006 period. The saline anomaly was maximum around 100–200 m deep, over the upper slope with values above 35.9 psu. Slope and shelf were seen to exhibit a complex structure of eastward (poleward) and westward (equatorward) currents. Maximum currents, observed near surface, over the upper slope in the eastern part of the Bay of Biscay, were determined to exceed 1.3 m s-1. This current system eventually became unstable, thereby promoting strong exchange of properties between coastal and deep ocean. The event was coincident with abnormal southerly wind conditions west of Iberia in autumn 2006, and with the unusually warm autumn–winter weather over western Europe. Adynamical analysis relying on wind forcing west and north of Iberia is proposed. Article in Journal/Newspaper Northeast Atlantic Université de Bretagne Occidentale: HAL Continental Shelf Research 29 8 1014 1025 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
Slope and shelf currents Wind forcing Eastern boundary currents Climate and interannual variability Hydrography Bay of Biscay (NortheasternAtlantic) [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Slope and shelf currents Wind forcing Eastern boundary currents Climate and interannual variability Hydrography Bay of Biscay (NortheasternAtlantic) [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Le Cann, Bernard Serpette, Alain Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
topic_facet |
Slope and shelf currents Wind forcing Eastern boundary currents Climate and interannual variability Hydrography Bay of Biscay (NortheasternAtlantic) [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Unusually warm and saline near-surface inflow was observed in the southern Bay of Biscay (Northeast Atlantic) in autumn–winter 2006–2007. These anomalies were swiftly entraine deast ward through the Iberian Poleward Current flowing over the slope and shelf. Here, we present a quasi-synoptic three dimensional view of this event, which started as early as August 2006. In situ hydrological and Lagrangian measurements were used to describe its characteristics. The warm anomaly was surface intensified over the shelf, with surface temperature above 17 °C, a monthly anomaly over 1 °C compared to the 1994–2006 period. The saline anomaly was maximum around 100–200 m deep, over the upper slope with values above 35.9 psu. Slope and shelf were seen to exhibit a complex structure of eastward (poleward) and westward (equatorward) currents. Maximum currents, observed near surface, over the upper slope in the eastern part of the Bay of Biscay, were determined to exceed 1.3 m s-1. This current system eventually became unstable, thereby promoting strong exchange of properties between coastal and deep ocean. The event was coincident with abnormal southerly wind conditions west of Iberia in autumn 2006, and with the unusually warm autumn–winter weather over western Europe. Adynamical analysis relying on wind forcing west and north of Iberia is proposed. |
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) Centre Militaire d'Océanographie EPSHOM |
format |
Article in Journal/Newspaper |
author |
Le Cann, Bernard Serpette, Alain |
author_facet |
Le Cann, Bernard Serpette, Alain |
author_sort |
Le Cann, Bernard |
title |
Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
title_short |
Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
title_full |
Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
title_fullStr |
Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
title_full_unstemmed |
Intense warm and saline upper ocean inflow in the southern Bay of Biscay in autumn–winter 2006–2007 |
title_sort |
intense warm and saline upper ocean inflow in the southern bay of biscay in autumn–winter 2006–2007 |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-00385168 https://doi.org/10.1016/j.csr.2008.11.015 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0278-4343 EISSN: 1873-6955 Continental Shelf Research https://hal.science/hal-00385168 Continental Shelf Research, 2009, 29 (8), pp.1014-1025. ⟨10.1016/j.csr.2008.11.015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.csr.2008.11.015 hal-00385168 https://hal.science/hal-00385168 doi:10.1016/j.csr.2008.11.015 |
op_doi |
https://doi.org/10.1016/j.csr.2008.11.015 |
container_title |
Continental Shelf Research |
container_volume |
29 |
container_issue |
8 |
container_start_page |
1014 |
op_container_end_page |
1025 |
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1785571220333264896 |