Quasi‐Real‐Time and High‐Resolution Spatiotemporal Distribution of Ocean Anthropogenic CO 2

Increasing marine uptake of anthropogenic CO 2 (C ant ) causes global ocean acidification. To obtain a high‐resolution spatiotemporal distribution of oceanic carbon chemistry , we developed new parameterizations of the seawater total alkalinity, and dissolved inorganic carbon from the ocean's surface to 2,000‐m depth by using dissolved oxygen, water temperature ( T ), salinity ( S ), and pressure ( P ) data. Using the values of total alkalinity and dissolved inorganic carbon predicted by dissolved oxygen, T , S , and P data derived from autonomous biogeochemical Argo floats, we described the distribution of oceanic C ant in the 2000s in the subarctic North Pacific at high spatiotemporal resolution. The C ant was found about 300 m deeper than during the 1990s; its average inventory to 2,000 m was 24.8 ± 10.2 mol/m 2 , about 20% higher than the 1990s average. Future application of parameterizations to global biogeochemical Argo floats data should allow the detailed global mapping of spatiotemporal distributions of CO 2 parameters.