Ocean acidification in coloured stripes

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The pH value of the global ocean decreased by 0.071 units from 1982 to 2021. Sin
The pH value of the global ocean decreased by 0.071 units from 1982 to 2021. Since the pH value is on a logarithmic scale, this corresponds to an increase in acidity of 18 percent. (Image: Nicolas Gruber & Luke Gregor / ETH Zurich)

Our oceans are acidifying rapidly. Climate researchers from ETH Zurich are now illustrating these chemical changes with colour-coded stripes. Global observations of ocean acidification over the last four decades serve as the basis.

Michael Keller