Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003
The southern Bay of Biscay (NW Spain) shows a very active hydrography due to the different origins of its Central Waters, the local modifications exerted on them by continental effects and the recurrence of mesoscale processes such as slope currents, upwellings and eddies. In order to assess the rol...
Published in: | Journal of Geophysical Research |
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2006
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Online Access: | http://hdl.handle.net/10508/7371 http://hdl.handle.net/10261/318808 https://doi.org/10.1029/2005JC002963 |
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ftcsic:oai:digital.csic.es:10261/318808 2024-02-11T10:06:34+01:00 Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 Llope, Marcos Anadón, Ricardo Viesca, L. Quevedo, M. González-Quirós, Rafael Stenseth, Nils Christian Atlantic Ocean Central Atlantic Eastern Central Atlantic Bay of Biscay 2006 http://hdl.handle.net/10508/7371 http://hdl.handle.net/10261/318808 https://doi.org/10.1029/2005JC002963 unknown Centro Oceanográfico de Cádiz Journal of Geophysical Research-Oceans, 111. 2006: C09021- http://hdl.handle.net/10508/7371 http://hdl.handle.net/10261/318808 doi:10.1029/2005JC002963 1110 2169-9291 none Medio Marino Centro Oceanográfico de Cádiz research article 2006 ftcsic https://doi.org/10.1029/2005JC002963 2024-01-16T11:45:15Z The southern Bay of Biscay (NW Spain) shows a very active hydrography due to the different origins of its Central Waters, the local modifications exerted on them by continental effects and the recurrence of mesoscale processes such as slope currents, upwellings and eddies. In order to assess the role of the different sources of variability we conducted a monthly series of CTD sampling in the central Cantabrian Sea along a coastal-oceanic transect, from 1993 to 2003. We analyzed the spatial variability of the hydrographic processes over different timescales. The thermohaline properties of Central Waters varied between those typical of the subpolar mode of the Eastern North Atlantic Central Water (ENACWsp) and a local mode, the Bay of Biscay Central Water (BBCW), though there has been a clear shift toward the BBCW prevalence in the last years. The Iberian Poleward Current (IPC) conveyed subtropical Central Waters (ENACWst) into the region almost every winter. This slope current may display a double-core structure during some extreme events. The upper layers of the ocean showed a long-term trend toward increasing temperature and decreasing salinity, and accordingly density was on the decrease. These patterns suggest an enhancement of the water column stratification. Coastal upwellings are an important source of inshore variability and counteract these long-term changes on the coast. However, their intensity seems to be decreasing and their seasonal pattern changing toward a general advancement of the upwelling-favorable season. No Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Journal of Geophysical Research 111 C9 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Medio Marino Centro Oceanográfico de Cádiz |
spellingShingle |
Medio Marino Centro Oceanográfico de Cádiz Llope, Marcos Anadón, Ricardo Viesca, L. Quevedo, M. González-Quirós, Rafael Stenseth, Nils Christian Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
topic_facet |
Medio Marino Centro Oceanográfico de Cádiz |
description |
The southern Bay of Biscay (NW Spain) shows a very active hydrography due to the different origins of its Central Waters, the local modifications exerted on them by continental effects and the recurrence of mesoscale processes such as slope currents, upwellings and eddies. In order to assess the role of the different sources of variability we conducted a monthly series of CTD sampling in the central Cantabrian Sea along a coastal-oceanic transect, from 1993 to 2003. We analyzed the spatial variability of the hydrographic processes over different timescales. The thermohaline properties of Central Waters varied between those typical of the subpolar mode of the Eastern North Atlantic Central Water (ENACWsp) and a local mode, the Bay of Biscay Central Water (BBCW), though there has been a clear shift toward the BBCW prevalence in the last years. The Iberian Poleward Current (IPC) conveyed subtropical Central Waters (ENACWst) into the region almost every winter. This slope current may display a double-core structure during some extreme events. The upper layers of the ocean showed a long-term trend toward increasing temperature and decreasing salinity, and accordingly density was on the decrease. These patterns suggest an enhancement of the water column stratification. Coastal upwellings are an important source of inshore variability and counteract these long-term changes on the coast. However, their intensity seems to be decreasing and their seasonal pattern changing toward a general advancement of the upwelling-favorable season. No |
format |
Article in Journal/Newspaper |
author |
Llope, Marcos Anadón, Ricardo Viesca, L. Quevedo, M. González-Quirós, Rafael Stenseth, Nils Christian |
author_facet |
Llope, Marcos Anadón, Ricardo Viesca, L. Quevedo, M. González-Quirós, Rafael Stenseth, Nils Christian |
author_sort |
Llope, Marcos |
title |
Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
title_short |
Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
title_full |
Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
title_fullStr |
Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
title_full_unstemmed |
Hydrography of the southern Bay of Biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
title_sort |
hydrography of the southern bay of biscay shelf-break region: integrating the multi-scale physical variability over the period 1993-2003 |
publishDate |
2006 |
url |
http://hdl.handle.net/10508/7371 http://hdl.handle.net/10261/318808 https://doi.org/10.1029/2005JC002963 |
op_coverage |
Atlantic Ocean Central Atlantic Eastern Central Atlantic Bay of Biscay |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Centro Oceanográfico de Cádiz Journal of Geophysical Research-Oceans, 111. 2006: C09021- http://hdl.handle.net/10508/7371 http://hdl.handle.net/10261/318808 doi:10.1029/2005JC002963 1110 2169-9291 |
op_rights |
none |
op_doi |
https://doi.org/10.1029/2005JC002963 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
C9 |
_version_ |
1790604364933496832 |