CTD CASTS

At all the hydrological stations, pressure (P), conductivity (C), temperature (T) and dissolved oxygen concentration (DO) were measured with a caroussel equipped with a SBE 911plus CTD. Salinity (S), density (D) and potential temperature ($\Theta$) were then derived from the measured parameters. A fluoremeter and a light transmission sensor were also operating. Temperature measurements were performed with a SBE 3plus sensor, with a resolution of 2x10$^{-4}$ , and conductivity measurements were performed with a SBE 4 sensor, with a resolution of 4x10$^{-5}$ S/m. Dissolved oxygen was measured with a SBE-43 sensor (resolution 4.3 $\mu$M). The vertical profiles of all parameters were obtained by sampling at 24 Hz, with the CTD/rosette descent rate of 1 m/s. The data were processed on board.

figure

Figure 10: The Rosette system and Lowered ADCPs.