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Posted Tue Jan 27 2009: from
NPR:
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Global Warming Is Irreversible, Study Says http://apocadocs.com/s.pl?1233077199
"People have imagined that if we stopped emitting carbon dioxide that the climate would go back to normal in 100 years or 200 years. What we're showing here is that's not right. It's essentially an irreversible change that will last for more than a thousand years," Solomon says.
This is because the oceans are currently soaking up a lot of the planet's excess heat -- and a lot of the carbon dioxide put into the air. The carbon dioxide and heat will eventually start coming out of the ocean. And that will take place for many hundreds of years.... The answer, he says, is sooner rather than later. Scientists have been trying to advise politicians about finding an acceptable level of carbon dioxide in the atmosphere. The new study suggests that it's even more important to aim low. If we overshoot, the damage can't be easily undone. Oppenheimer feels more urgency than ever to deal with climate change, but he says that in the end, setting acceptable limits for carbon dioxide is a judgment call.
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[Read more stories about:
anthropogenic change, ocean warming, ocean acidification, global warming, arctic meltdown, carbon emissions]
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