Sunday, April 06, 2008

Runaway Climate Change

I have more coverage over at my other group blog on Global Warming, the Carbon Copy, but here's the Guardian's coverage of this news.

In a startling reappraisal of the threat, James Hansen, head of the Nasa Goddard Institute for Space Studies in New York, calls for a sharp reduction in C02 limits.

Hansen says the EU target of 550 parts per million of C02 - the most stringent in the world - should be slashed to 350ppm...Instead of using theoretical models to estimate the sensitivity of the climate, his team turned to evidence from the Earth's history, which they say gives a much more accurate picture....

Hansen said that he now regards as "implausible" the view of many climate scientists that the shrinking of the ice sheets would take thousands of years. "If we follow business as usual I can't see how west Antarctica could survive a century. We are talking about a sea-level rise of at least a couple of metres this century."

The revised target is likely to prompt criticism that he is setting the bar unrealistically high. With the US administration still acting as a drag on international efforts, climate campaigners are struggling even to get a 450ppm target to stick. |Climate target is not radical enough - Guardian|

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