According to NOAA, ocean pH has fallen by 0.1 units over the past 200 years, making ocean waters 30 percent more acidic.
Sources
- The Pacific Ocean—facts and information (nationalgeographic.com)
- https://www.noaa.gov/education/resource-collections/ocean-coasts/ocean-acidification (noaa.gov)
- https://www.pmel.noaa.gov/co2/story/What+is+Ocean+Acidification%253F (pmel.noaa.gov)
- https://ocean.si.edu/ocean-life/invertebrates/ocean-acidification (ocean.si.edu)
- https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022MS003563 (agupubs.onlinelibrary.wiley.com)
- https://www.washington.edu/news/2025/11/13/carbon-rich-waters-are-becoming-more-acidic-faster/ (washington.edu)
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