Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S)
This paper presents the first data on the vertical distribution of chlorophyll and nutrients in the upper layers of the southern southwestern Atlantic and interprets it in relation to frontal systems and the general hydrographic features. The survey covered quasi-synoptically the area between 30 and...
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ftconicet:oai:ri.conicet.gov.ar:11336/71703 2023-10-09T21:46:59+02:00 Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) Pereira Brandini, Frederico Boltovskoy, Demetrio Piola, Alberto Ricardo Kocmur, Santiago Röttgers, Rüdiger Cesar Abreu, Paulo Mendes Lopes, Rubens application/pdf http://hdl.handle.net/11336/71703 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0967063799000758 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0967-0637(99)00075-8 http://hdl.handle.net/11336/71703 Pereira Brandini, Frederico; Boltovskoy, Demetrio; Piola, Alberto Ricardo; Kocmur, Santiago; Röttgers, Rüdiger; et al.; Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S); Pergamon-Elsevier Science Ltd; Deep Sea Research Part I: Oceanographic Research Papers; 47; 6; 6-2000; 1015-1033 0967-0637 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Brazil-Malvinas Confluence Zone Chlorophyll Nutrients Polar Front Southwestern Atlantic Thermal Fronts https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/S0967-0637(99)00075-8 2023-09-24T18:30:17Z This paper presents the first data on the vertical distribution of chlorophyll and nutrients in the upper layers of the southern southwestern Atlantic and interprets it in relation to frontal systems and the general hydrographic features. The survey covered quasi-synoptically the area between 30 and 62°S, at the beginning of the austral summers of three consecutive years (1993 through 1995). Our results show a rather consistent oceanographic structure, with similar patterns of chlorophyll and nutrient distributions with latitude. Outstanding features present throughout the three seasons are two zones of high phytoplankton production, where chlorophyll concentrations of > 1 μg/l seem to occur frequently. The first is the upper euphotic zone of the Brazil-Malvinas Confluence Zone between approximately 36 and 50°S. The second is centered on subsurface layers of the Antarctic Surface Water south of the Polar Front as far as 62°S. The rest of the area covered shows low chlorophyll concentrations (< 0.4 μg/l), due either to nutrient limitation in the oligotrophic subtropical waters of the Brazil Current or to excessive turbulence and upper-layer instability in the energetic Malvinas Current. The occurrence of a permanent meander around 38°S coincided with the cyclonic retroflexion of the Malvinas Current, causing upwelling of deep water. The ecological implications of this eddy-induced upwelling are discussed. (C) 2000 Elsevier Science Ltd. Fil: Pereira Brandini, Frederico. Universidade Federal do Paraná; Brasil Fil: Boltovskoy, Demetrio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Austral Argentina Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Armada Argentina ENVELOPE(-58.000,-58.000,-85.000,-85.000) Deep Sea Research Part I: Oceanographic Research Papers 47 6 1015 1033 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Brazil-Malvinas Confluence Zone Chlorophyll Nutrients Polar Front Southwestern Atlantic Thermal Fronts https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Brazil-Malvinas Confluence Zone Chlorophyll Nutrients Polar Front Southwestern Atlantic Thermal Fronts https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Pereira Brandini, Frederico Boltovskoy, Demetrio Piola, Alberto Ricardo Kocmur, Santiago Röttgers, Rüdiger Cesar Abreu, Paulo Mendes Lopes, Rubens Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
topic_facet |
Brazil-Malvinas Confluence Zone Chlorophyll Nutrients Polar Front Southwestern Atlantic Thermal Fronts https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
This paper presents the first data on the vertical distribution of chlorophyll and nutrients in the upper layers of the southern southwestern Atlantic and interprets it in relation to frontal systems and the general hydrographic features. The survey covered quasi-synoptically the area between 30 and 62°S, at the beginning of the austral summers of three consecutive years (1993 through 1995). Our results show a rather consistent oceanographic structure, with similar patterns of chlorophyll and nutrient distributions with latitude. Outstanding features present throughout the three seasons are two zones of high phytoplankton production, where chlorophyll concentrations of > 1 μg/l seem to occur frequently. The first is the upper euphotic zone of the Brazil-Malvinas Confluence Zone between approximately 36 and 50°S. The second is centered on subsurface layers of the Antarctic Surface Water south of the Polar Front as far as 62°S. The rest of the area covered shows low chlorophyll concentrations (< 0.4 μg/l), due either to nutrient limitation in the oligotrophic subtropical waters of the Brazil Current or to excessive turbulence and upper-layer instability in the energetic Malvinas Current. The occurrence of a permanent meander around 38°S coincided with the cyclonic retroflexion of the Malvinas Current, causing upwelling of deep water. The ecological implications of this eddy-induced upwelling are discussed. (C) 2000 Elsevier Science Ltd. Fil: Pereira Brandini, Frederico. Universidade Federal do Paraná; Brasil Fil: Boltovskoy, Demetrio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina ... |
format |
Article in Journal/Newspaper |
author |
Pereira Brandini, Frederico Boltovskoy, Demetrio Piola, Alberto Ricardo Kocmur, Santiago Röttgers, Rüdiger Cesar Abreu, Paulo Mendes Lopes, Rubens |
author_facet |
Pereira Brandini, Frederico Boltovskoy, Demetrio Piola, Alberto Ricardo Kocmur, Santiago Röttgers, Rüdiger Cesar Abreu, Paulo Mendes Lopes, Rubens |
author_sort |
Pereira Brandini, Frederico |
title |
Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
title_short |
Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
title_full |
Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
title_fullStr |
Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
title_full_unstemmed |
Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S) |
title_sort |
multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern atlantic (30-62°s) |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/71703 |
long_lat |
ENVELOPE(-63.033,-63.033,-64.867,-64.867) ENVELOPE(-58.000,-58.000,-85.000,-85.000) |
geographic |
Antarctic The Antarctic Austral Argentina Ricardo Armada Argentina |
geographic_facet |
Antarctic The Antarctic Austral Argentina Ricardo Armada Argentina |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0967063799000758 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0967-0637(99)00075-8 http://hdl.handle.net/11336/71703 Pereira Brandini, Frederico; Boltovskoy, Demetrio; Piola, Alberto Ricardo; Kocmur, Santiago; Röttgers, Rüdiger; et al.; Multiannual trends in fronts and distribution of nutrients and chlorophyll in the southwestern Atlantic (30-62°S); Pergamon-Elsevier Science Ltd; Deep Sea Research Part I: Oceanographic Research Papers; 47; 6; 6-2000; 1015-1033 0967-0637 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/S0967-0637(99)00075-8 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
47 |
container_issue |
6 |
container_start_page |
1015 |
op_container_end_page |
1033 |
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1779309638729072640 |