Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field?
The hydrographical and dynamical properties of the upwelling filaments forming off Cap Blanc (Mauritania) are investigated using remotely sensed and in situ data collected in April/May 2009 during the strongest upwelling season. The area is situated at the southern edge of the NW African upwelling s...
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Online Access: | https://archimer.ifremer.fr/doc/00098/20920/18578.pdf https://doi.org/10.1029/2012JC007905 https://archimer.ifremer.fr/doc/00098/20920/ |
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ftarchimer:oai:archimer.ifremer.fr:20920 2023-05-15T17:34:50+02:00 Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? Meunier, Thomas Barton, E. D. Barreiro, B. Torres, R. 2012-08 application/pdf https://archimer.ifremer.fr/doc/00098/20920/18578.pdf https://doi.org/10.1029/2012JC007905 https://archimer.ifremer.fr/doc/00098/20920/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00098/20920/18578.pdf doi:10.1029/2012JC007905 https://archimer.ifremer.fr/doc/00098/20920/ 2012. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (0148-0227) (Amer Geophysical Union), 2012-08 , Vol. 117 , N. C08031 , P. 18p. text Publication info:eu-repo/semantics/article 2012 ftarchimer https://doi.org/10.1029/2012JC007905 2021-09-23T20:21:17Z The hydrographical and dynamical properties of the upwelling filaments forming off Cap Blanc (Mauritania) are investigated using remotely sensed and in situ data collected in April/May 2009 during the strongest upwelling season. The area is situated at the southern edge of the NW African upwelling system, where the Cape Verde Frontal Zone (CVFZ) separates warmer, saltier North Atlantic Central Water (NACW) and cooler, fresher South Atlantic Central Water (SACW). Sea surface temperature images indicated the presence of an upwelling filament extending >280 km offshore, rooted over the Cap Blanc promontory and entrained around a warm-core anticyclonic eddy. After this filament started to decay, a new cold filament developed at the approximate same location. High resolution Moving Vessel Profiler (MVP) and Acoustic Doppler Current Profiler (ADCP) surveys of these mesoscale structures revealed that both filaments were carrying South Atlantic Central Water (SACW) offshore through an intense jet-like flow. Similarity of the relative vorticity structure across the filament with that of the tangent eddy suggested that the latter was responsible for the offshore current. Tracking of this eddy in altimetric data demonstrated that it originated from the CVFZ, as implied by its hydrographic structure. Altimetric data also revealed that another anticyclonic structure centered over the Cap Blanc promontory was responsible for the northwestward advection of SACW into the base of the filament. The results support the idea that some upwelling filaments can be produced by the interaction of an external eddy field, including topographic eddies, with the upwelled water. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Journal of Geophysical Research: Oceans 117 C8 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The hydrographical and dynamical properties of the upwelling filaments forming off Cap Blanc (Mauritania) are investigated using remotely sensed and in situ data collected in April/May 2009 during the strongest upwelling season. The area is situated at the southern edge of the NW African upwelling system, where the Cape Verde Frontal Zone (CVFZ) separates warmer, saltier North Atlantic Central Water (NACW) and cooler, fresher South Atlantic Central Water (SACW). Sea surface temperature images indicated the presence of an upwelling filament extending >280 km offshore, rooted over the Cap Blanc promontory and entrained around a warm-core anticyclonic eddy. After this filament started to decay, a new cold filament developed at the approximate same location. High resolution Moving Vessel Profiler (MVP) and Acoustic Doppler Current Profiler (ADCP) surveys of these mesoscale structures revealed that both filaments were carrying South Atlantic Central Water (SACW) offshore through an intense jet-like flow. Similarity of the relative vorticity structure across the filament with that of the tangent eddy suggested that the latter was responsible for the offshore current. Tracking of this eddy in altimetric data demonstrated that it originated from the CVFZ, as implied by its hydrographic structure. Altimetric data also revealed that another anticyclonic structure centered over the Cap Blanc promontory was responsible for the northwestward advection of SACW into the base of the filament. The results support the idea that some upwelling filaments can be produced by the interaction of an external eddy field, including topographic eddies, with the upwelled water. |
format |
Article in Journal/Newspaper |
author |
Meunier, Thomas Barton, E. D. Barreiro, B. Torres, R. |
spellingShingle |
Meunier, Thomas Barton, E. D. Barreiro, B. Torres, R. Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
author_facet |
Meunier, Thomas Barton, E. D. Barreiro, B. Torres, R. |
author_sort |
Meunier, Thomas |
title |
Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
title_short |
Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
title_full |
Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
title_fullStr |
Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
title_full_unstemmed |
Upwelling filaments off Cap Blanc: Interaction of the NW African upwelling current and the Cape Verde frontal zone eddy field? |
title_sort |
upwelling filaments off cap blanc: interaction of the nw african upwelling current and the cape verde frontal zone eddy field? |
publisher |
Amer Geophysical Union |
publishDate |
2012 |
url |
https://archimer.ifremer.fr/doc/00098/20920/18578.pdf https://doi.org/10.1029/2012JC007905 https://archimer.ifremer.fr/doc/00098/20920/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal Of Geophysical Research-oceans (0148-0227) (Amer Geophysical Union), 2012-08 , Vol. 117 , N. C08031 , P. 18p. |
op_relation |
https://archimer.ifremer.fr/doc/00098/20920/18578.pdf doi:10.1029/2012JC007905 https://archimer.ifremer.fr/doc/00098/20920/ |
op_rights |
2012. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2012JC007905 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
117 |
container_issue |
C8 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766133799116079104 |