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| The single-celled organism Stensioeina beccariiformis survived the asteroid impact that killed the dinosaurs 65 million years ago but went extinct 9 million years later, when the oceans acidified due to a massive CO2 release. It ranged across many depths, in all oceans. (Credit: Ellen Thomas) |
Ocean acidification rate may be unprecedented, study says
ScienceDaily (Mar. 1, 2012) — The world's oceans may be turning acidic faster today from human carbon emissions than they did during four major extinctions in the last 300 million years, when natural pulses of carbon sent global temperatures soaring, says a new study in Science. The study is the first of its kind to survey the geologic record for evidence of ocean acidification over this vast time period.
