ALT Plots showing the temporal evolution of the global ocean CO2 sink.a, Global ocean CO2 sink estimated by the six ocean partial pressure of CO2 (pCO2) observation-based products contained in SeaFlux. b, Contribution of the Southern Ocean and of individual ocean basins (north of 44° S) to the global ocean CO2 sink based on the ensemble mean of the SeaFlux products. The global ocean carbon sink varies substantially in time around the long-term trend given by the steady-state uptake of anthropogenic CO2 with a period of stagnant uptake in the 1990s followed by a period of faster than expected growth of the ocean carbon sink after the turn of the millennium.