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dc.contributor.author
Carbajal, Juan Cruz
dc.contributor.author
Rivas, Andres Lujan
dc.contributor.author
Chavanne, Cédric
dc.date.available
2019-12-20T20:06:49Z
dc.date.issued
2018-12
dc.identifier.citation
Carbajal, Juan Cruz; Rivas, Andres Lujan; Chavanne, Cédric; High-frequency frontal displacements south of san jorge gulf during a tidal cycle near spring and neap phases biological implications between tidal states; Oceanography Society; Oceanography; 31; 4; 12-2018; 60-69
dc.identifier.issn
1042-8275
dc.identifier.uri
http://hdl.handle.net/11336/92660
dc.description.abstract
San Jorge Gulf (SJG) is a region of high biological productivity that supports important shrimp (Pleoticus muelleri) and hake (Merluccius hubbsi) fisheries, as well as high marine biodiversity associated, in part, with a tidal front located in the southern part of the gulf. In situ high-resolution cross-frontal measurements were collected using a remotely operated towed vehicle to characterize the three-dimensional structure of the tidal front and to investigate how its position varies during the semidiurnal tidal cycle (high/low) and the spring to neap transition, together with its impact on the distribution of nutrients and chlorophyll-a. Estimates of tidal height and flow velocity derived from a numerical model support the conclusion that frontal displacements mostly result from advec-tion by cross-frontal tidal currents. The frontal position was also modified by baroclinic instabilities that significantly distort the front. Measurements reveal intrusions of low-salinity, nutrient-rich waters from the mixed side into the pycnocline on the stratified side cause a subsurface chlorophyll-a peak near the neap phase. Most prior studies of fronts in the SJG have been limited to their surface manifestations because they were conducted using satellite images. This article aims to contribute to the understanding of the complex southern tidal front dynamics, highlighting that maximum primary productivity occurs in a subsurface layer that is not visible by satellite sensors.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oceanography Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
tidal front
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subsurface intrusion
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spring/neap transitions
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rich-nutrient waters
dc.subject.classification
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
High-frequency frontal displacements south of san jorge gulf during a tidal cycle near spring and neap phases biological implications between tidal states
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-28T18:17:37Z
dc.journal.volume
31
dc.journal.number
4
dc.journal.pagination
60-69
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Carbajal, Juan Cruz. Centro Para El Estudio de Sistemas Marinos (cesimar), Conicet-cenpat; Argentina
dc.description.fil
Fil: Rivas, Andres Lujan. Centro Para El Estudio de Sistemas Marinos (cesimar), Conicet-cenpat; Argentina
dc.description.fil
Fil: Chavanne, Cédric. Institut Des Sciences de la Mer de Rimouski; Canadá
dc.journal.title
Oceanography
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5670/oceanog.2018.411
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://tos.org/oceanography/article/high-frequency-frontal-displacements-south-of-san-jorge-gulf-during-a-tidal
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