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dc.contributor.author
Paniagua, Guillermina Fernanda
dc.contributor.author
Saraceno, Martin
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Piola, Alberto Ricardo
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Charo, Marcela
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Ferrari, Ramiro
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Artana, Camila Indira
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Provost, Christine
dc.date.available
2022-12-15T18:28:30Z
dc.date.issued
2021-07
dc.identifier.citation
Paniagua, Guillermina Fernanda; Saraceno, Martin; Piola, Alberto Ricardo; Charo, Marcela; Ferrari, Ramiro; et al.; Malvinas current at 44.7°S: First assessment of velocity temporal variability from in situ data; Pergamon-Elsevier Science Ltd; Progress In Oceanography; 195; 7-2021
dc.identifier.issn
0079-6611
dc.identifier.uri
http://hdl.handle.net/11336/181409
dc.description.abstract
We report current meter measurements obtained by four moorings deployed across the Malvinas Current (MC) at 44.7°S during 18 months between December 2015-June 2017. Previous measurements of the MC strength have been reported only close to the Brazil-Malvinas Confluence, hindering the interpretation of the flow variability. The record-length time averaged velocities and variance ellipses indicate a strong northward along-isobath. The MC flow is dominated by its barotropic component. The meridional velocities at the western and eastern moorings are not correlated and show large amplitude oscillations which are coherent with the passage of mesoscale features over the moorings. Satellite altimetry data, that are highly correlated with 20-day low-pass filtered in situ velocities (r ~ 0.80), show that the MC variability is affected by the propagation of sea level anomalies (SLA) along the Patagonian slope with phase speeds that range between 0.21 ± 0.04 m s−1 and 0.14 ± 0.01 m s−1. SLAs propagate northward along the slope following contours of constant planetary potential vorticity and its phase speeds decrease towards the east along the slope. SLA arriving at 44.7°S originate near the North Scotia Ridge and along the Malvinas Escarpment, along the northern edge of the Malvinas Plateau. We suggest that the interaction between mesoscale features and the complex bathymetry at those locations generate instabilities that enhance the generation of SLAs that propagate in the flow direction along the western boundary of the Argentine Basin and affect the variability of the MC velocities observed at 44.7°S.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
IN SITU TIME SERIES
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MALVINAS CURRENT VARIABILITY
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PATAGONIAN SLOPE
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SATELLITE ALTIMETRY DATA
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Oceanografía, Hidrología, Recursos Hídricos
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Malvinas current at 44.7°S: First assessment of velocity temporal variability from in situ data
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-09-20T18:50:15Z
dc.journal.volume
195
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Paniagua, Guillermina Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
dc.description.fil
Fil: Saraceno, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
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Fil: Piola, Alberto Ricardo. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
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Fil: Charo, Marcela. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
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Fil: Ferrari, Ramiro. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
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Fil: Artana, Camila Indira. MERCATOR OCEAN; Francia
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Fil: Provost, Christine. Sorbonne University. Campus Pierre Et Marie Curie. Institut Pierre Simon la Place. Laboratoire D´ Oceanographie Et Climat, Experimentation Et Approches Numerique; Francia
dc.journal.title
Progress In Oceanography
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0079661121000793
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.pocean.2021.102592
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