March 23, 2009 Just a little known fact here to make your life a little more accurate. Recent studies have found that the ocean’s pH has changed from 8.16 to 8.05 since the Industrial revolution. This is 100 times faster than normal, but it just doesn’t look like much until one understands the significance of logarithmic numbers. You see, pH is measured on a logarithmic table. A pH of 8 is 10 times more acidic than a pH of 9 and 100 times more acidic than a pH of 10. So, a pH of 8.05 is one times more acidic than a pH of 8.16 (ok, 1.1 times more). One times more is 100% more, which is twice as much.
Moy, Howard , Bray and Trull, Reduced calcification in modern Southern Ocean planktonic foraminifera, Nature Geoscience, March 2009.