Ocean pH and acidification February 15, 2014 Ocean pH of the 70’s For the pelagic zone (upper 200 m of ocean levels), over the decade of the 1970’s, I have extracted 475,194 pH records. All data were accessed from the NOAA WOD database 4043total visits,3visits todayTweetShareSharePin You May Also Like Ocean pH and acidification Ocean pH of the 1990’s Ocean pH and acidification Ocean pH and NASA’s Seawater O-18 Map