Quasi‐real‐time and high‐resolution spatiotemporal distribution of ocean anthropogenic CO2

Increasing marine uptake of anthropogenic CO2 (Cant) causes global ocean acidification. To obtain a high‐resolution spatiotemporal distribution of oceanic carbon chemistry, we developed new parameterizations of the seawater total alkalinity (TA), and dissolved inorganic carbon (DIC) from the ocean’s surface to 2000 m depth by using dissolved oxygen (DO), water temperature (T), salinity (S), and pressure (P) data. Using the values of TA and DIC predicted by DO, T, S, and P data derived from autonomous biogeochemical Argo floats (BGC‐Argo), we described the distribution of oceanic Cant in the 2000s in the subarctic North Pacific at high spatiotemporal resolution. The Cant was found about 300 m deeper than during the 1990s; its average inventory to 2000 m was 24.8 ± 10.2 mol m–2, about 20% higher than the 1990s average. Future application of parameterizations to global BGC‐Argo data should allow the detailed global mapping of spatiotemporal distributions of CO2 parameters.

Li B. F., Watanabe Y. W., Hosoda S., Sato K. & Nakano Y., in press. Quasi‐real‐time and high‐resolution spatiotemporal distribution of ocean anthropogenic CO2. Geophysical Research Letters. Article.

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