A pair of environmental physicists at the Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, has built a 3D model of the world's oceans and their currents to learn more about the depths that ocean acidification has reached due to increasing levels of carbon dioxide in the atmosphere. In their paper published in the journal Science Advances, Jens Müller and Nicolas Grube describe the factors that went into their model and what it showed them about ocean acidification around the globe.