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dc.contributor.author
Palma, Elbio Daniel
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dc.contributor.author
Matano, Ricardo
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dc.contributor.author
Combes, Vincent
dc.date.available
2022-05-05T13:45:31Z
dc.date.issued
2021-11
dc.identifier.citation
Palma, Elbio Daniel; Matano, Ricardo; Combes, Vincent; Circulation and cross-shelf exchanges in the Malvinas Islands Shelf region; Pergamon-Elsevier Science Ltd; Progress In Oceanography; 198; 11-2021; 1-15
dc.identifier.issn
0079-6611
dc.identifier.uri
http://hdl.handle.net/11336/156626
dc.description.abstract
The Malvinas Islands Shelf (MIS) encompasses one of the most productive portions of the southwestern Atlantic. Large phytoplankton blooms, which constitute the base of the marine food web, emerge from the northern sector of the MIS and extend hundreds of kilometers northward along the Patagonian shelfbreak. The physical processes contributing to MIS fertilization are poorly understood. Here we use the results of a high-resolution ocean model to characterize circulation and water mass exchanges between the MIS and the Southern Ocean, as well as to identify the physical processes underlying fertilization of the shelf waters. Model results show that the shelf is characterized by an anticyclonic circulation pattern in the southeastern region that intensifies during summer and weakens during winter. The blocking effect of the islands leads to development of an upwind westward flowing current in the northern portion of the MIS, recirculation cells in the western portion, and a northward throughflow in the narrow strait separating them. Particle tracking experiments reveal that the northern portion of the Drake Passage is the largest water mass source for the MIS. Passive tracers indicate that the place where the Antarctic Circumpolar Current collides with the MIS is the main site for the outcropping of deep waters. Subsequent outcropping is largely driven by the synergetic interaction of tides and wind forcing. After spreading along the southwestern shelfbreak, the concentration of tracer peaks in the winter and decays during the spring. In summer, the tracer accumulates on the lee of the islands in agreement with satellite images of chlorophyll-a concentration. Additional experiments show that there is an important contribution of MIS waters to the Patagonian shelfbreak front.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
MALVINAS ISLANDS
dc.subject
SOUTH ATLANTIC OCEAN
dc.subject
OCEAN MODELLING
dc.subject
CROSS-SHELF EXCHANGES
dc.subject.classification
Oceanografía, Hidrología, Recursos Hídricos
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Circulation and cross-shelf exchanges in the Malvinas Islands Shelf region
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-04-21T17:11:00Z
dc.journal.volume
198
dc.journal.pagination
1-15
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Palma, Elbio Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
dc.description.fil
Fil: Matano, Ricardo. State University of Oregon; Estados Unidos
dc.description.fil
Fil: Combes, Vincent. State University of Oregon; Estados Unidos
dc.journal.title
Progress In Oceanography
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0079661121001518
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.pocean.2021.102666
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