The carbon regeneration in the water column ofthe Cariaco Basin (Venezuela) was investigatedusing a regression model of total alkalinity (TA)and the concentration of total inorganic carbon(TCO2). Primary productivity (PP) was determinedfrom the inorganic carbon fraction assimilatedby phytoplankton and the variation of the 22 and23°C isotherm was used as an indicator of coastalupwelling. The results indicate that CO2 levels werelowest (1962 μmol/kg) at the surface and increasedto 2451 &...