CANOPO proposes a collaboration between Italy, Argentina and France to address the issue of quantifying the CO2 air-sea fluxes in the western part of the South Atlantic. This objective will be pursued relying on the ongoing ARGAU project in which surface physical and biogeochemical parameters CO2 partial pressure are measured during oceanographic cruises at board of then Argentina's ice-brecker "A. IRIZAR". CANOPO will collect simultaneous temperature vertical profiles in a transect intersecting the main temperature fronts that will be also monitored with altimeter data. The influence of physical and biological processes in the CO2 absorption will be reconstructed with a 1-D ML model and with 3D global OGCM and bio-geochemical models. The OGCM will be employed also to study the fate of the water masses of the ML on the locations where the CO2 sinks. The variability of the ML depth will be estimated using data and models. The quantity of CO2 absorbed in the area, will be estimated by means of an integrated analysis of CANOPO and ARGAU data and models.