Measuring Ocean Acidification (IMAGE) University of Delaware Caption Scientists gather around a Conductivity, Temperature, Depth (CTD) rosette, a machine used during the West Coast Ocean Acidification Cruise, to collect samples that measure concentrations of oxygen, pH, and carbon, salinity, chlorophyll and nutrients. Credit Photo courtesy of NOAA and Meghan Shea Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.