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Ocean acidification: mean seawater pH

Mean seawater pH is shown based on in-situ measurements of pH from the Aloha station.

Oct 31, 1988Dec 19, 2019Feb 25, 1998Aug 18, 2003Feb 7, 2009Jul 31, 2014Annual averageMonthly pH measurement
Oct 31, 1988
Dec 19, 2019