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  • 1
    Online Resource
    Online Resource
    A numerical study of the Southwestern Atlantic Shelf circulation: Stratified ocean response to local and offshore forcing
    American Geophysical Union (AGU) ; 2008
    In:  Journal of Geophysical Research Vol. 113, No. C11 ( 2008-11-11)
    Details
    In: Journal of Geophysical Research, American Geophysical Union (AGU), Vol. 113, No. C11 ( 2008-11-11)
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2007JC004720
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2008
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    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
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    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
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    SSG: 16,13
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  • 2
    Online Resource
    Online Resource
    Large-scale migration of a school shark, Galeorhinus galeus , in the Southwestern Atlantic
    FapUNIFESP (SciELO) ; 2018
    In:  Neotropical Ichthyology Vol. 16, No. 1 ( 2018-03-15)
    Details
    In: Neotropical Ichthyology, FapUNIFESP (SciELO), Vol. 16, No. 1 ( 2018-03-15)
    Abstract: RESUMEN El conocimiento sobre los patrones de distribución espacio-temporal de los condrictios es crítico para su manejo efectivo. En este trabajo presentamos y analizamos una migración latitudinal de gran escala (~ 1.425 km) de una hembra de cazón en la plataforma del Océano Atlántico Sudoccidental, donde está actualmente clasificada como Críticamente en Peligro. Durante el verano austral (15 de Febrero de 2015), 94 cazones fueron capturados (75 hembras y 19 machos) y señalados con marcas “rotatag” en el Golfo Nuevo (~ 42°43’S, 64°53’W, Argentina). Una hembra de 112 cm de longitud total fue recapturada en aguas de la plataforma uruguaya durante el invierno austral (17 de Agosto de 2015). Este gran desplazamiento representa la primera evidencia directa para apoyar la hipótesis de Vooren y Lucifora sobre una única población transnacional de Galeorhinus galeus en el Océano Atlántico Sudoccidental. La gran coincidencia encontrada entre las condiciones de hábitat para el cazón (salinidad 33-34, temperatura 12-17° C) y el integrante más cálido del Agua de Plataforma Subantártica sugiere que la variación estacional en la abundancia del cazón dentro de esta región podría estar relacionada con el movimiento de las masas de agua.
    Type of Medium: Online Resource
    ISSN: 1982-0224 , 1679-6225
    URL: Article
    DOI: 10.1590/1982-0224-20170050
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2018
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    SSG: 12
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  • 3
    Online Resource
    Online Resource
    The Upstream Spreading of Bottom-Trapped Plumes
    American Meteorological Society ; 2010
    In:  Journal of Physical Oceanography Vol. 40, No. 7 ( 2010-07-01), p. 1631-1650
    Details
    In: Journal of Physical Oceanography, American Meteorological Society, Vol. 40, No. 7 ( 2010-07-01), p. 1631-1650
    Abstract: It is well known that numerical simulations of freshwater discharges produce plumes that spread in the direction opposite to that of the propagation of coastally trapped waves (the upstream direction). The lack of a theory explaining these motions in unforced environments deemed the numerical results suspect. Thus, it became a common practice in numerical studies to add a downstream mean flow to arrest the development of the upstream perturbation. This approach is generally unjustified, and it remains a matter of interest to determine if the upstream displacement produced by models is a geophysical phenomenon or a consequence of erroneous assumptions in the model setup. In this article, the results of highly idealized numerical experiments are used to investigate these matters. It is shown that this phenomenon is associated with the geostrophic adjustment of the discharge and that upstream motion is endemic to the baroclinic structure of bottom-trapped plumes. It is also shown that downstream displacements are generated by the cross-shelf barotropic pressure gradient generated by the propagation of coastally trapped waves. Sensitivity experiments indicate that the speed of upstream propagation and the density structure of the plume are affected by bottom friction, the slope of the bottom, and the magnitude of the density anomaly. Bottom friction in particular slows down the progression of the plume and changes its density structure, producing a more homogeneous downstream region and a more stratified upstream region.
    Type of Medium: Online Resource
    ISSN: 1520-0485 , 0022-3670
    URL: Article
    DOI: 10.1175/2010JPO4351.1
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2010
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  • 4
    Online Resource
    Online Resource
    On the Upwelling of Downwelling Currents
    American Meteorological Society ; 2008
    In:  Journal of Physical Oceanography Vol. 38, No. 11 ( 2008-11-01), p. 2482-2500
    Details
    In: Journal of Physical Oceanography, American Meteorological Society, Vol. 38, No. 11 ( 2008-11-01), p. 2482-2500
    Abstract: The term “downwelling currents” refers to currents with a downslope mass flux in the bottom boundary layer. Examples are the Malvinas and Southland Currents in the Southern Hemisphere and the Oyashio in the Northern Hemisphere. Although many of these currents generate the same type of highly productive ecosystems that is associated with upwelling regimes, the mechanism that may drive such upwelling remains unclear. In this article, it is postulated that the interaction between a downwelling current and the continental slope generates shelfbreak upwelling. The proposed mechanism is relatively simple. As a downwelling current flows along the continental slope, bottom friction and lateral diffusion spread it onto the neighboring shelf, thus generating along-shelf pressure gradients and a cross-shelf circulation pattern that leads to shelfbreak upwelling. At difference with previous studies of shelfbreak dynamics (e.g., Gawarkiewicz and Chapman, Chapman and Lentz, and Pickart), the shelfbreak upwelling in the proposed model is not controlled by the downslope buoyancy flux associated with the presence of a shelf current but by the along-shelf pressure gradient associated with the presence of a slope current. As these experiments demonstrate, shelfbreak upwelling will occur in flat-bottomed domains or even in the absence of a bottom boundary layer. The shelfbreak upwelling, moreover, is not evidence of the separation of the bottom boundary layer but of the downstream divergence of the slope currents, and its magnitude is proportional to the volume transport of that current. To prove this hypothesis, the results of a series of process-oriented numerical experiments are presented.
    Type of Medium: Online Resource
    ISSN: 1520-0485 , 0022-3670
    URL: Article
    DOI: 10.1175/2008JPO3783.1
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2008
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  • 5
    Online Resource
    Online Resource
    The Impact of Boundary Conditions on the Upstream Spreading of Bottom-Trapped Plumes
    American Meteorological Society ; 2013
    In:  Journal of Physical Oceanography Vol. 43, No. 5 ( 2013-05-01), p. 1060-1069
    Details
    In: Journal of Physical Oceanography, American Meteorological Society, Vol. 43, No. 5 ( 2013-05-01), p. 1060-1069
    Abstract: This study shows that simulations of bottom-trapped plumes in periodic or closed domains generate a spurious cyclonic current that arrests the natural tendency of the plume to move upstream. Furthermore, it also shows that attempts to obstruct the upstream spreading lead to a bias of the fundamental characteristics of the plume.
    Type of Medium: Online Resource
    ISSN: 0022-3670 , 1520-0485
    URL: Article
    DOI: 10.1175/JPO-D-12-0116.1
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2013
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    detail.hit.zdb_id: 184162-2
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  • 6
    Online Resource
    Online Resource
    Circulation and Cross‐Shelf Exchanges in the Northern Shelf of the Southwestern Atlantic: Dynamics
    American Geophysical Union (AGU) ; 2023
    In:  Journal of Geophysical Research: Oceans Vol. 128, No. 7 ( 2023-07)
    Details
    In: Journal of Geophysical Research: Oceans, American Geophysical Union (AGU), Vol. 128, No. 7 ( 2023-07)
    Abstract: The variability of the shelf circulation and cross‐shelf exchanges off Southern Brazil and Uruguay is investigated using model experiments More than 50% of the total shelf transport variability is explained by internal ocean variability Eddies along the shelfbreak play an important role in the advection of colder, fresher, and nutrient‐rich shelf water to the open‐ocean
    Type of Medium: Online Resource
    ISSN: 2169-9275 , 2169-9291
    URL: Article
    DOI: 10.1029/2023JC019887
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2023
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    SSG: 16,13
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  • 7
    Online Resource
    Online Resource
    Circulation and cross-shelf exchanges in the Malvinas Islands Shelf region
    Elsevier BV ; 2021
    In:  Progress in Oceanography Vol. 198 ( 2021-11), p. 102666-
    Details
    In: Progress in Oceanography, Elsevier BV, Vol. 198 ( 2021-11), p. 102666-
    Type of Medium: Online Resource
    ISSN: 0079-6611
    URL: Article
    DOI: 10.1016/j.pocean.2021.102666
    RVK:
    RB 10402
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
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    SSG: 21,3
    SSG: 14
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  • 8
    Online Resource
    Online Resource
    Dynamical analysis of the oceanic circulation in the Gulf of San Jorge, Argentina
    Elsevier BV ; 2020
    In:  Journal of Marine Systems Vol. 203 ( 2020-03), p. 103261-
    Details
    In: Journal of Marine Systems, Elsevier BV, Vol. 203 ( 2020-03), p. 103261-
    Type of Medium: Online Resource
    ISSN: 0924-7963
    URL: Article
    DOI: 10.1016/j.jmarsys.2019.103261
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2020
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    detail.hit.zdb_id: 1041191-4
    SSG: 14
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  • 9
    Online Resource
    Online Resource
    Geomorphologic and physical characteristics of a human impacted estuary: Quequén Grande River Estuary, Argentina
    Elsevier BV ; 2005
    In:  Estuarine, Coastal and Shelf Science Vol. 62, No. 1-2 ( 2005-1), p. 301-312
    Details
    In: Estuarine, Coastal and Shelf Science, Elsevier BV, Vol. 62, No. 1-2 ( 2005-1), p. 301-312
    Type of Medium: Online Resource
    ISSN: 0272-7714
    URL: Article
    DOI: 10.1016/j.ecss.2004.09.018
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2005
    detail.hit.zdb_id: 1466742-3
    detail.hit.zdb_id: 763369-5
    SSG: 21,3
    SSG: 12
    SSG: 14
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  • 10
    Online Resource
    Online Resource
    Disentangling the upwelling mechanisms of the South Brazil Bight
    Elsevier BV ; 2009
    In:  Continental Shelf Research Vol. 29, No. 11-12 ( 2009-6), p. 1525-1534
    Details
    In: Continental Shelf Research, Elsevier BV, Vol. 29, No. 11-12 ( 2009-6), p. 1525-1534
    Type of Medium: Online Resource
    ISSN: 0278-4343
    URL: Article
    DOI: 10.1016/j.csr.2009.04.002
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2009
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    SSG: 13
    SSG: 14
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