Current rates of ocean acidification are unparalleled in Earth's history

The study, based on an expert workshop led by Columbia University's Lamont-Doherty Earth Observatory and the University of Bristol, assessed in detail a number of climate change events in the planet's history, including the asteroid impact that made the dinosaurs go extinct and the Permian mass-extinction which wiped out around 95 per cent of all life on Earth. The findings are reported this week in Science.

Oceans are currently absorbing about a quarter of the CO2 released into the atmosphere, lowering the pH of the surface ocean. As atmospheric CO2 increases, so does the rate at which it will dissolve in seawater, forcing surface ocean pH lower and lower – a process called ocean acidification.