NOAA / SCIENCE PHOTO LIBRARY NOAA / SCIENCE PHOTO LIBRARY
This image may not be used to state or imply NOAA endorsement of any company or product.
Map showing the surface pH of the world's oceans in 1861. The oceans are slightly alkaline, with an average pH of around 8.1 (7 is neutral). More than a quarter of the carbon dioxide released into the atmosphere is absorbed by the oceans, causing them to become more acidic. Data based on a computer model that makes predictions of pH change based on estimates of carbon dioxide emissions.
Model release not required. Property release not required.