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Three graphs showing blue, black and grey curved lines for Dissolved Inorganic Carbon, pH and pCO2 and how the line varies by depth

The modern ocean (blue dashed profiles) reflects the combination of natural, preindustrial conditions (black profiles) and human-induced changes (gray shading). (a) Dissolved inorganic carbon (DIC; µmol kg-1) has increased most near the surface where the ocean absorbs CO2 from the atmosphere. This has caused measurable and distinct changes in (b) pH and (c) pCO2 (µatm). Click on image to enlarge.