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Posted Tue Jun 3 2014: from Earth Institute, via Science Daily:
Modern ocean acidification is outpacing ancient upheaval: Rate may be ten times faster
Some 56 million years ago, a massive pulse of carbon dioxide into the atmosphere sent global temperatures soaring. In the oceans, carbonate sediments dissolved, some organisms went extinct and others evolved. Scientists have long suspected that ocean acidification caused the crisis -- similar to today, as humanmade CO2 combines with seawater to change its chemistry. Now, for the first time, scientists have quantified the extent of surface acidification from those ancient days, and the news is not good: the oceans are on track to acidify at least as much as they did then, only at a much faster rate.... "We are dumping carbon in the atmosphere and ocean at a much higher rate today -- within centuries," said study coauthor Richard Zeebe, a paleoceanographer at the University of Hawaii. "If we continue on the emissions path we are on right now, acidification of the surface ocean will be way more dramatic than during the PETM."
[Read more stories about: ocean acidification, death spiral, massive die-off]
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'Doc Michael says:
Evolution needs to up its game if it wants our respect. Faster! Ten times faster!

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