Weak Signal's description 
Increases of atmospheric CO2 and associated decreases in seawater pH and carbonate ion concentration this century and beyond are likely to have wide impacts on marine ecosystems including those of the Mediterranean Sea. Consequences of this process, ocean acidification, threaten the health of the Mediterranean, adding to other anthropogenic pressures, including those from climate change. Current interdisciplinary approaches involving biologists, earth scientists, and economists, through observations, experiments, and modelling, will provide science-based projections of acidification under the influence of climate change as well as associated economic impacts. These scientific advances should provide the best advice to policymakers who must develop regional strategies for adaptation and mitigation.