Absorbing large amounts of atmospheric CO2, the oceans are large and important buffering zones in the Earth system. A correct quantification of the present uptake is not only vital to map the current patterns, but also to ensure relevant estimates of how large the future marine uptake of CO2 will be and how these patterns will change. The needs for relevant data have been noted by the European Commission, funding two subsequent projects on the subject of marine carbon uptake coordinated by the University of Bergen in Norway.