The world’s oceans are becoming more acidic because of CO2 emissions from human activity. The more CO2 is emitted into the atmosphere, the more the oceans absorb and the more “acidic” they become, i.e. the pH value of seawater is declining. The increase in ocean CO2 has caused average ocean surface acidity to increase by 30 per cent since the beginning of the industrial revolution.
National Aeronautics and Space Administration (NASA), Goddard Institute for Space Studies (GISS); National Oceanic and Atmospheric Administration (NOAA), Pacific Marine Environmental Laboratory (PMEL), Carbon Group; NASA, Global Climate Change: Vital Signs of the Planet; World Meteorological Organization (WMO).
From collection: Global linkages – a graphic look at the changing Arctic (rev.1)