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- Mar 2022
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www.ipcc.ch www.ipcc.ch
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The ocean is continuing to acidify in response to ongoing ocean carbon uptake. The open ocean surface water pH is observed to be declining (virtually certain) by a very likely range of 0.017−0.027 pH units per decade since the late 1980s across individual time series observations longer than 15 years.
This is a small range of decrease. Nonetheless, small changes in concentration are proportional to the very small organisms and processes that rely on limited conditions.
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