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You are here: Home / Data and maps / Maps and graphs / Ocean acidity over the past 25 million years and projected to 2100

Ocean acidity over the past 25 million years and projected to 2100

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The ‘pH’ is a measure of acidity – the lower the number the more acidic the ocean becomes. On a geological timescale, ocean pH has been relatively stable. Recently, oceans have been acidifying fast and this is projected to continue at a rate unprecedented for millions of years.

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The figure is covering EU and the rest of the world. The temporal coverage is: -25 M years – 2100 (projections)

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European Environment Agency (EEA)
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