Hydrobiology in the Cabo Frio (Brazil) upwelling: two-dimensional structure and variability during a wind cycle

Seasonal variability and coastal upwelling near Cape Santa Marta (Brazil)

“…The numerical simulations with realistic coastline and topography of Rodrigues and Lorenzzetti []forced by 6 m s −1 winds led to a mean upwelling velocity of 4.7 × 10 −4 m s −1 (~40.5 m day −1 ). Estimates of vertical velocity based on the displacement of the 18°C isotherm off Cape Frio indicated upwelling velocities varying from 0.3 × 10 −4 to 0.8 × 10 −4 m s −1 (~2.5–7 m day −1 ), while downwelling velocities were 1 order of magnitude larger [11 × 10 −4 m s −1 or ~95 m day −1 , Valentin et al ., ], but similar to those found in this study. In the Peruvian upwelling area off San Juan, the largest upwelling velocities estimated by Brink et al .…”

Seasonal variability and coastal upwelling near Cape Santa Marta (Brazil)

“…The numerical simulations with realistic coastline and topography of Rodrigues and Lorenzzetti []forced by 6 m s −1 winds led to a mean upwelling velocity of 4.7 × 10 −4 m s −1 (~40.5 m day −1 ). Estimates of vertical velocity based on the displacement of the 18°C isotherm off Cape Frio indicated upwelling velocities varying from 0.3 × 10 −4 to 0.8 × 10 −4 m s −1 (~2.5–7 m day −1 ), while downwelling velocities were 1 order of magnitude larger [11 × 10 −4 m s −1 or ~95 m day −1 , Valentin et al ., ], but similar to those found in this study. In the Peruvian upwelling area off San Juan, the largest upwelling velocities estimated by Brink et al .…”

Yearly variation of bacterial production in the Arraial do Cabo protection area (Cabo Frio upwelling region): an evidence of anthropogenic pressure

“…Our results confirmed that upwelling is the main process determining the abiotic and biotic characteristics of the surface waters in Arraial do Cabo, followed by the winds dynamics, as observed by Valentin and colleagues (1984; 1987) in a fixed station (Focinho do Cabo). Hydrological data were variable during sampling periods and stations (Tables 1 and 2), confirming constant disturbances in the system.…”

10.1016/0967-0653(95)96612-9

“…Abiotic Features.-Bottom sea water temperature and salinity variations recorded during this study are in accordance with the local hydrological patterns (Moreira da Silva, 1965;Mascarenhas et aI., 1971;Ikeda et aI., 1971;Valentin, 1984;Valentin et aI., 1987). The high frequency of cold waters in conjunction with low salinity (SACW) in spring and summer (October to March, mainly) and warm tropical water and higher salinity (BC and CW) in autumn and winter are due to prevailing E-NE and S-SW winds, respectively.…”

Seasonal variability and coastal upwelling near Cape Santa Marta (Brazil)

“…The numerical simulations with realistic coastline and topography of Rodrigues and Lorenzzetti []forced by 6 m s −1 winds led to a mean upwelling velocity of 4.7 × 10 −4 m s −1 (~40.5 m day −1 ). Estimates of vertical velocity based on the displacement of the 18°C isotherm off Cape Frio indicated upwelling velocities varying from 0.3 × 10 −4 to 0.8 × 10 −4 m s −1 (~2.5–7 m day −1 ), while downwelling velocities were 1 order of magnitude larger [11 × 10 −4 m s −1 or ~95 m day −1 , Valentin et al ., ], but similar to those found in this study. In the Peruvian upwelling area off San Juan, the largest upwelling velocities estimated by Brink et al .…”

Yearly variation of bacterial production in the Arraial do Cabo protection area (Cabo Frio upwelling region): an evidence of anthropogenic pressure

“…Our results confirmed that upwelling is the main process determining the abiotic and biotic characteristics of the surface waters in Arraial do Cabo, followed by the winds dynamics, as observed by Valentin and colleagues (1984; 1987) in a fixed station (Focinho do Cabo). Hydrological data were variable during sampling periods and stations (Tables 1 and 2), confirming constant disturbances in the system.…”

10.1016/0967-0653(95)96612-9

“…Abiotic Features.-Bottom sea water temperature and salinity variations recorded during this study are in accordance with the local hydrological patterns (Moreira da Silva, 1965;Mascarenhas et aI., 1971;Ikeda et aI., 1971;Valentin, 1984;Valentin et aI., 1987). The high frequency of cold waters in conjunction with low salinity (SACW) in spring and summer (October to March, mainly) and warm tropical water and higher salinity (BC and CW) in autumn and winter are due to prevailing E-NE and S-SW winds, respectively.…”

Seasonal variability and coastal upwelling near Cape Santa Marta (Brazil)

“…The numerical simulations with realistic coastline and topography of Rodrigues and Lorenzzetti []forced by 6 m s −1 winds led to a mean upwelling velocity of 4.7 × 10 −4 m s −1 (~40.5 m day −1 ). Estimates of vertical velocity based on the displacement of the 18°C isotherm off Cape Frio indicated upwelling velocities varying from 0.3 × 10 −4 to 0.8 × 10 −4 m s −1 (~2.5–7 m day −1 ), while downwelling velocities were 1 order of magnitude larger [11 × 10 −4 m s −1 or ~95 m day −1 , Valentin et al ., ], but similar to those found in this study. In the Peruvian upwelling area off San Juan, the largest upwelling velocities estimated by Brink et al .…”

Yearly variation of bacterial production in the Arraial do Cabo protection area (Cabo Frio upwelling region): an evidence of anthropogenic pressure

“…Our results confirmed that upwelling is the main process determining the abiotic and biotic characteristics of the surface waters in Arraial do Cabo, followed by the winds dynamics, as observed by Valentin and colleagues (1984; 1987) in a fixed station (Focinho do Cabo). Hydrological data were variable during sampling periods and stations (Tables 1 and 2), confirming constant disturbances in the system.…”

10.1016/0967-0653(95)96612-9

“…Abiotic Features.-Bottom sea water temperature and salinity variations recorded during this study are in accordance with the local hydrological patterns (Moreira da Silva, 1965;Mascarenhas et aI., 1971;Ikeda et aI., 1971;Valentin, 1984;Valentin et aI., 1987). The high frequency of cold waters in conjunction with low salinity (SACW) in spring and summer (October to March, mainly) and warm tropical water and higher salinity (BC and CW) in autumn and winter are due to prevailing E-NE and S-SW winds, respectively.…”