Experiment studies circulation in the western South Atlantic

Campos, Edmo; Ikeda, Yoshimine; Castro, Belmiro Mendes de; Gaeta, Salvador Airton; Lorenzzetti, João A.; Stevenson, Merritt R.

doi:10.1029/96eo00177

Cited by 70 publications

(65 citation statements)

References 2 publications

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“…Segundo Campos et al (1996), a penetração deáguas frias oriundas da região da Confluência Subtropical na plataforma continental brasileira alcança limites setentrionais médios em torno de 28 • S, próximo ao Cabo de Santa Marta. Somente em condições anômalas a CCC alcançaria menores latitudes.…”

Section: Discussionunclassified

“…Apresentam contornos delimitados por intensos gradientes de propriedades físicas em superfície e em subsuperfície, em geral ocorrem associados a correntes instáveis (Olson, 1991). Campos et al (1996) afirmam que os vórtices na Bacia de Santos, tanto ciclônicos como anticiclônicos, são formados em lados opostos ao eixo da CB e aparentemente não se desprendem da corrente.…”

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Caracterização de feições oceanográficas na plataforma de Santa Catarina através de imagens orbitais

Pereira¹,

Schettini²,

Omachi³

2009

Rev. Bras. Geof.

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ABSTRACT. The objective of this paper is to characterize surface small and meso-scale oceanographic features in the Santa Catarina continental shelf, Brazil. The features were identified using MODIS satellite imagery of sea surface temperature (SST) and sea surface chlorophyll (SSC). One daily image was selected for each month of the year 2003, excepting December, aiming to search for seasonality. The oceanographic features were identified by visual inspection, applying different levels of contrast and color palettes to improve the visualization. The features identified were distinguished in eddies, meanders, mushroom like features, plumes, filaments, fronts and upwelling areas. The results indicated that during the summer, the continental shelf is homogeneous with few surface features. The most prominent feature during summer period (January to March) was the upwelling area nearby Santa Marta Cape, southern from Florianópolis Island. During the fall and winter seasons there were more surface features, mainly due to the evolution of the Prata Front system, with smaller SST and higher SSC.

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Section: Discussionunclassified

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Caracterização de feições oceanográficas na plataforma de Santa Catarina através de imagens orbitais

Pereira¹,

Schettini²,

Omachi³

2009

Rev. Bras. Geof.

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“…Satellite-derived sea surface temperatures reveal that the coldest water tongue over the shelf (17øC) extends northward to 26øS [Campos et al, 1996a]. An additional drifter deployed at the Brazil Current in late April 1993 near 30øS also drifted onshore and followed a similar path and temperature trend, suggesting that the northward recirculation was indeed a large scale feature at the time.…”

Section: Campos Et Al [1996a] Andmentioning

confidence: 99%

Subtropical Shelf Front off eastern South America

Piola¹,

Campos²,

Möller³

et al. 2000

J. Geophys. Res.

417

347

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“…Due to the confluence of both currents between latitudes 25°S and 45°S of the western South Atlantic observed in certain periods of the year, there is the formation of water masses like the South Atlantic Central Water (SACW; T < 20ºC, S < 36.4), accounting for part of the convergence of the subtropical gyre and giving rise to the Cabo Frio upwelling, which extends between 23 o S and 29 o S (Castro-Filho et al, 1987;Campos et al, 1996Campos et al, , 2000Silveira et al, 2000;Acha et al, 2004). This upwelling is enhanced by coastal winds and by the break in the continental shelf (approximately 50 km from the coast) driven by the meandering pattern and eddy of the Brazil Current (Castro & Miranda, 1998;Campos et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

How marine upwelling influences the distribution of Artemesia longinaris (Decapoda: Penaeoidea)?

Sancinetti¹,

Azevedo

Castilho³

et al. 2014

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ABSTRACT. Upwelling events can occur in most of the oceans altering the water physical, chemical and sediment conditions and consequently the species communities dwelling the areas. For better understanding the behavior of populations inhabiting upwelling regions, the spatial and temporal distribution of a Penaeoidea shrimp was studied correlating it with the abiotic factors that vary during upwelling and non-upwelling periods in an area under influence of Cabo Frio upwelling. Bottom salinity and temperature, organic matter and sediment type from each station were sampled from March 2008 to February 2010, in six stations located between 5 and 45 m depth. The lowest temperatures were recorded during spring and summer for both years with temperature values lower than 19 o C. A total of 26,466 Artemesia longinaris shrimps were captured mainly in 10-35 m depth. Upwelling periods showed significant differences in abundance in relation to nonupwelling periods. The spatial distribution among stations varied according to the temperature with higher abundance in stations with values between 19 and 21 o C. The highest abundance of A. longinaris was recorded in spring and summer when intrusions of the cold waters of South Atlantic Central Waters (SACW) were frequent. Thus, the effect of cold water of SACW boosted by the upwelling was a determinant factor in the spatial and temporal distribution of A. longinaris in the studied region. Keywords: Artemesia longinaris, Penaeoidea, distribution, environmental factors, SACW, Brazil, South Atlantic Ocean. ¿Cómo influye la surgencia marina en la distribución de Artemesia longinaris (Decapoda: Penaeoidea)?RESUMEN. Los eventos de surgencia pueden ocurrir en la mayoría de los océanos alterando las condiciones físicas y químicas del agua y del sedimento, y por consiguiente a las comunidades de especies que viven en la zona. Para una mejor comprensión del comportamiento de las poblaciones que habitan en las regiones de surgencia, se estudió la distribución espacial y temporal de un camarón peneido y se correlacionó con los factores abióticos que varían durante los períodos de surgencia y sin surgencia, en una zona bajo la influencia de la surgencia de Cabo Frío. La salinidad y temperatura del fondo, materia orgánica y el tipo de sedimento de cada estación fueron muestreados entre marzo 2008 y febrero 2010, en seis estaciones ubicadas entre 5 y 45 m de profundidad. Las temperaturas más bajas se registraron durante primavera y verano para ambos años, cuando los valores de temperatura fueron inferiores a 19°C. Un total de 26.466 camarones de Artemesia longinaris se capturó principalmente entre 10 y 35 m. Los períodos de surgencia mostraron diferencias significativas en la abundancia en relación con los períodos sin surgencia. La distribución espacial entre estaciones varió según la temperatura con las mayores abundancias en las estaciones con valores entre 19 y 21°C. La mayor abundancia de A. longinaris se registró en primavera y verano, cuando las intrusiones de las frías aguas del Agua ...

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Experiment studies circulation in the western South Atlantic

Cited by 70 publications

References 2 publications

Caracterização de feições oceanográficas na plataforma de Santa Catarina através de imagens orbitais

Caracterização de feições oceanográficas na plataforma de Santa Catarina através de imagens orbitais

Subtropical Shelf Front off eastern South America

How marine upwelling influences the distribution of Artemesia longinaris (Decapoda: Penaeoidea)?

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