"Carbon fluxes mediated by Plankton in Subtropical Oligotrophic environments: a Lagrangian approach (CARPOS)". CARPOS proposes as a general objective to quantify the net metabolic balance of carbon in the photic layer of the central and peripheral subtropical North Atlantic region using a Lagrangian approximation ( deployment of drifter buoys) . This objective is broken down into 4 specific objectives: 1) verify that the central zone of the subtropical turn of the North Atlantic presents a net balance of the neutral or positive planktonic community, 2) construct and compare metabolic balances in vitro and in situ in two contrasting oligotrophic regions, 3) quantify the effect of small-scale physical variability on the productivity of the region and evaluate its influence on the net metabolic balance and 4) to evaluate the effect of methodological limitations potentially associated with the performance of in vitro experiments on the metabolic balance of this oceanic region

CARPOS Cruise (29HE20061011) carried out on the Research Vessel Hespérides in 2006