Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986
32 pages, 15 figures, 3 tables. The coastal transition zone and adjacent continental shelf of the Iberian upwelling system was studied in September 1986, during the seasonal transition from upwelling-favored to downwelling-favored winds. The most striking features in the coastal transition zone were...
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Yale University
1997
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Online Access: | http://hdl.handle.net/10261/26136 https://doi.org/10.1357/0022240973224436 |
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ftcsic:oai:digital.csic.es:10261/26136 2024-02-11T10:06:40+01:00 Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 Castro, Carmen G. Álvarez-Salgado, Xosé Antón Figueiras, F. G. Pérez, Fiz F. Fraga, Fernando 1997-03 1994613 bytes application/pdf http://hdl.handle.net/10261/26136 https://doi.org/10.1357/0022240973224436 en eng Yale University http://dx.doi.org/10.1357/0022240973224436 Journal of Marine Research 55(2): 321-352 (1997) 0022-2402 http://hdl.handle.net/10261/26136 doi:10.1357/0022240973224436 open artículo http://purl.org/coar/resource_type/c_6501 1997 ftcsic https://doi.org/10.1357/0022240973224436 2024-01-16T09:27:37Z 32 pages, 15 figures, 3 tables. The coastal transition zone and adjacent continental shelf of the Iberian upwelling system was studied in September 1986, during the seasonal transition from upwelling-favored to downwelling-favored winds. The most striking features in the coastal transition zone were: (1) a poleward flow of high salinity Eastern North Atlantic Central Water (subtropical) off the Rías Baixas (Galician western coast); and (2) an anticyclonic eddy off Cape Ortegal (Galician northern coast). Chemical and biological similarities between both structures, clearly different from the surrounding oceanic waters, suggest that the eddy was an isolated and aged parcel of water originating from the poleward flow. The continental shelf was characterized by: (1) outwelling of chlorophyll-rich waters from the four large coastal embayments (the “Rías Baixas”) in the western coast and; (2) an upwelling front off the northern coast. The coexistence of opposite hydrographic structures, as the poleward flow and the upwelling front, was the consequence of transitional wind conditions in September–October, and we hypothesized transitional conditions to be crucial for the development of the eddy. Both the poleward flow and the eddy precluded the shelf-edge exchange of microplankton populations developed over the shelf, leading to massive in situ sedimentation and subsequent nutrient mineralization over the shelf. Support for this work came from CICYT Grant No. 84-0068. A fellowship from the Spanish Ministerio de Educación y Ciencia allowed C.G.C. to carry out this work. X.A.A.S. and F.F.P. were also supported for this work by the project EU-MAS2-CT93-65. Peer reviewed Article in Journal/Newspaper North Atlantic Digital.CSIC (Spanish National Research Council) Journal of Marine Research 55 2 321 352 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
32 pages, 15 figures, 3 tables. The coastal transition zone and adjacent continental shelf of the Iberian upwelling system was studied in September 1986, during the seasonal transition from upwelling-favored to downwelling-favored winds. The most striking features in the coastal transition zone were: (1) a poleward flow of high salinity Eastern North Atlantic Central Water (subtropical) off the Rías Baixas (Galician western coast); and (2) an anticyclonic eddy off Cape Ortegal (Galician northern coast). Chemical and biological similarities between both structures, clearly different from the surrounding oceanic waters, suggest that the eddy was an isolated and aged parcel of water originating from the poleward flow. The continental shelf was characterized by: (1) outwelling of chlorophyll-rich waters from the four large coastal embayments (the “Rías Baixas”) in the western coast and; (2) an upwelling front off the northern coast. The coexistence of opposite hydrographic structures, as the poleward flow and the upwelling front, was the consequence of transitional wind conditions in September–October, and we hypothesized transitional conditions to be crucial for the development of the eddy. Both the poleward flow and the eddy precluded the shelf-edge exchange of microplankton populations developed over the shelf, leading to massive in situ sedimentation and subsequent nutrient mineralization over the shelf. Support for this work came from CICYT Grant No. 84-0068. A fellowship from the Spanish Ministerio de Educación y Ciencia allowed C.G.C. to carry out this work. X.A.A.S. and F.F.P. were also supported for this work by the project EU-MAS2-CT93-65. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Castro, Carmen G. Álvarez-Salgado, Xosé Antón Figueiras, F. G. Pérez, Fiz F. Fraga, Fernando |
spellingShingle |
Castro, Carmen G. Álvarez-Salgado, Xosé Antón Figueiras, F. G. Pérez, Fiz F. Fraga, Fernando Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
author_facet |
Castro, Carmen G. Álvarez-Salgado, Xosé Antón Figueiras, F. G. Pérez, Fiz F. Fraga, Fernando |
author_sort |
Castro, Carmen G. |
title |
Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
title_short |
Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
title_full |
Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
title_fullStr |
Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
title_full_unstemmed |
Transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the Iberian upwelling system (NW Spain) in September 1986 |
title_sort |
transient hydrographic and chemical conditions affecting microplankton populations in the coastal transition zone of the iberian upwelling system (nw spain) in september 1986 |
publisher |
Yale University |
publishDate |
1997 |
url |
http://hdl.handle.net/10261/26136 https://doi.org/10.1357/0022240973224436 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1357/0022240973224436 Journal of Marine Research 55(2): 321-352 (1997) 0022-2402 http://hdl.handle.net/10261/26136 doi:10.1357/0022240973224436 |
op_rights |
open |
op_doi |
https://doi.org/10.1357/0022240973224436 |
container_title |
Journal of Marine Research |
container_volume |
55 |
container_issue |
2 |
container_start_page |
321 |
op_container_end_page |
352 |
_version_ |
1790604505788710912 |