Apparently, the upwelling currents from the deep sea are being acidified. Nature obviously played a big part, but I doubt we will be shrugging this off for long.
http://seattletimes.nwsource.com/html/localnews/2009336458_oysters14m.html
That's one of the scariest things I've read in a long time. Full article here.Seawater typically is slightly alkaline, but when oceans absorb carbon dioxide from the atmosphere as they have by the hundreds of billions of tons since the Industrial Revolution they become more corrosive.
Climate modelers predicted greenhouse gases would make marine waters more acidic by century's end. They expected to notice it first in deep water, some of which hasn't circulated to the surface in 1,500 years and has therefore accumulated more atmospheric carbon dioxide. And deep waters already run higher in carbon dioxide because dying plants, animals and fish sink and decay.
But two years ago, oceanographers Richard Feely and Chris Sabine, both with the National Oceanic and Atmospheric Administration's Pacific Marine Environmental Laboratory in Seattle, found more acidified waters already reaching the surface.
http://seattletimes.nwsource.com/html/localnews/2009336458_oysters14m.html
How does this work?