Oceans (IMAGE) Helmholtz Association Caption The oceans do not only get warmer with the chaning climate but also more acidic by sinking pH values. Credit Photo: Frank Rödel / Alfred Wegener Institute Usage Restrictions The photos are free to use in connection with reports about the <i>Nature Climate Change</i> paper by Astrid Wittmann and Hans-Otto-Pörtner (doi: 10.1038/nclimate1982) 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.