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Representative time series of hourly seawater pHT values for (A) northern and (B) southern sites at Castello Aragonese d’Ischia in the ambient (blue), low (yellow), and extreme low (red) pH zones. Time series for (A) the northern site is from September 13 to October 8, 2010, and time series for (B) the southern site is from May 12 to June 14, 2010.
