IPCC Sixth Assessment Report, Working Group I, Chapter 5: Global Carbon and Other Biogeochemical Cycles and Feedbacks

evidence

The ocean has absorbed a large share of anthropogenic carbon dioxide emissions and surface ocean pH has declined by roughly 0.1 units since the pre-industrial period, corresponding to an increase in hydrogen ion concentration of around thirty per cent. V55 verification basis: not consulted in this session; these are standard assessed figures stated from the producing model's knowledge of the assessment, not read from the chapter, and no confidence language from the report is reproduced.

A evidence is not a place. Drawing it on a map would assert something about the world that no stored fact supports.