Monica Allen Friday, August 17, 2018 / Categories: Research Headlines, Climate, Ecosystems Study: northern coastal waters are more vulnerable to acidification Acidified ocean waters can disorient some fish species NOAA and partner scientists speaking Friday, August 17, at the Goldschmidt annual international conference on geochemistry reported their research is finding that coastal waters and river estuaries are more vulnerable to ocean acidification than offshore waters. These waters are more severely affected by ocean acidification because they receive fresh water runoff that contributes to higher levels of dissolved carbon dioxide. This acidification, detected in research cruises off the United States West Coast and Gulf of Mexico, can cause some marine fish species to suffer cognitive problems and disorientation, the scientists said, with these fish losing their way or even swimming towards predators. Researchers also find that dissolved carbon dioxide levels are disproportionately affecting the wellbeing of fish in colder northern waters, such as off the state of Washington, than in warmer coastal waters such as the Gulf of Mexico. “We checked coastal waters in the Gulf of Mexico, and all along the U.S. West coast,” said Richard Feely, a NOAA senior scientist. “We found that cold water changes the water’s chemistry so that it can’t buffer itself as effectively against changes in acidity. This can cause large fluctuations in the CO2 levels, according to the season, with colder areas being more vulnerable to large swings in the partial pressure of carbon dioxide in the ocean. It is these increases in partial pressure of carbon dioxide which threaten the well-being of marine life.” NOAA and partner scientists studied water samples collected from a series of research cruises that took place in 2007, 2011, 2012, 2013 and 2016, and found that there were significant differences in the levels of CO2 dissolved in the ocean water. The research was funded through the NOAA Ocean Acidification Program. Go online to read the press release from the Goldschmidt conference. For more information, please contact Monica Allen, NOAA Communications, at firstname.lastname@example.org or 301-734-1123. Print 6790 Tags: ocean acidification ocean chemistry PMEL Related articles NOAA launches major field campaign to improve weather and climate prediction Tiny shells reveal waters off California are acidifying twice as fast as the global ocean Indo-Pacific Ocean warming is changing global rainfall patterns NOAA Research scientists named AAAS Fellows So what are marine heat waves?