Intense ocean acidification portends ecological catastrophe: ‘We have been warned’

By Dilip -
The acidification of the Earth’s oceans, which climate scientists warn is a dangerous effect of continued carbon emissions, was behind a mass extinction event 66 million years ago, according to a new study. Small-shelled marine organisms survived the meteorite that struck the Earth and wiped out the dinosaurs, according to researchers at the GFZ geosciences research center in Potsdam, 
Germany, but the subsequent sharp drop in pH levels in the ocean caused the marine life to go extinct.

“We show ocean acidification can precipitate ecological collapse,” Michael Henehan, who led the study, told The Guardian. Researchers examined shell fossils in sediment dating back to the time period just after the meteorite struck the planet, which showed that the oceans’ pH dropped by about 0.25 units in the 100 to 1,000 years after the strike. “In the boundary clay, we managed to capture them just limping on past the asteroid impact,” Henehan said....

As Common Dreams reported in July, MIT researchers also recently turned their attention to ocean acidification as well. The researchers released data showing that today’s carbon levels could be fast approaching a tipping point threshold that could trigger extreme ocean acidification similar to the kind that contributed to the Permian–Triassic mass extinction, which occurred about 250 million years ago.... read more:
https://www.alternet.org/2019/10/study-confirms-fear-that-intense-ocean-acidification-portends-ecological-catastrophe-we-have-been-warned/

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