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Abstract:

The Patagonia continental shelf located off southeastern South America is bounded offshore by the Malvinas Current, which extends northward from northern Drake Passage (∼55deg; S) to nearly 38deg; S. The transition between relatively warm-fresh shelf waters and Subantarctic Waters from the western boundary current is characterized by a thermohaline front extending nearly 2500 km. We use satellite derived sea surface temperature, and chlorophyll-a data combined with hydrographic and surface drifter data to document the intrusions of slope waters onto the continental shelf near 41deg; S. These intrusions create vertically coherent localized negative temperature and positive salinity anomalies extending onshore about 150 km from the shelf break. The region is associated with a center of action of the first mode of non-seasonal sea surface temperature variability and also relatively high chlorophyll-a variability, suggesting that the intrusions are important in promoting the local development of phytoplankton. The generation of slope water penetrations at this location may be triggered by the inshore excursion of the 100 m isobath, which appears to steer the Malvinas Current waters over the outer shelf.

Registro:

Documento: Artículo
Título:Malvinas-slope water intrusions on the northern Patagonia continental shelf
Autor:Piola, A.R.; Martínez Avellaneda, N.; Guerrero, R.A.; Jardón, F.P.; Palma, E.D.; Romero, S.I.
Filiación:Departamento Oceanografia, Servicio de Hidrografia Naval, Buenos Aires, Argentina
Departamento de Ciencias de la Atmósfera y Los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
Institut für Meereskunde, KlimaCampus, Universität Hamburg, Hamburg, Germany
Instituto Nacional de Investigación y Desarrollo Pesquero, Mar del Plata, Argentina
Laboratoire d'Océanographie et du Climat, Université de Paris VI, Paris, France
Departamento de Fisica, Universidad Nacional Del sur, Bahia Blanca, Argentina
Instituto Argentino de Oceanografia, CONICET, Bahia Blanca, Argentina
Palabras clave:chlorophyll a; continental shelf; continental slope; data set; hydrography; oceanic front; phytoplankton; salinity; satellite imagery; sea surface temperature; western boundary current; Atlantic Ocean; Drake Passage; Malvinas Current; Patagonia
Año:2010
Volumen:6
Número:1
Página de inicio:345
Página de fin:359
DOI: http://dx.doi.org/10.5194/os-6-345-2010
Título revista:Ocean Science
Título revista abreviado:Ocean Sci.
ISSN:18120784
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_18120784_v6_n1_p345_Piola.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18120784_v6_n1_p345_Piola

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Citas:

---------- APA ----------
Piola, A.R., Martínez Avellaneda, N., Guerrero, R.A., Jardón, F.P., Palma, E.D. & Romero, S.I. (2010) . Malvinas-slope water intrusions on the northern Patagonia continental shelf. Ocean Science, 6(1), 345-359.
http://dx.doi.org/10.5194/os-6-345-2010
---------- CHICAGO ----------
Piola, A.R., Martínez Avellaneda, N., Guerrero, R.A., Jardón, F.P., Palma, E.D., Romero, S.I. "Malvinas-slope water intrusions on the northern Patagonia continental shelf" . Ocean Science 6, no. 1 (2010) : 345-359.
http://dx.doi.org/10.5194/os-6-345-2010
---------- MLA ----------
Piola, A.R., Martínez Avellaneda, N., Guerrero, R.A., Jardón, F.P., Palma, E.D., Romero, S.I. "Malvinas-slope water intrusions on the northern Patagonia continental shelf" . Ocean Science, vol. 6, no. 1, 2010, pp. 345-359.
http://dx.doi.org/10.5194/os-6-345-2010
---------- VANCOUVER ----------
Piola, A.R., Martínez Avellaneda, N., Guerrero, R.A., Jardón, F.P., Palma, E.D., Romero, S.I. Malvinas-slope water intrusions on the northern Patagonia continental shelf. Ocean Sci. 2010;6(1):345-359.
http://dx.doi.org/10.5194/os-6-345-2010