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Devil In The Details: Is Copenhagens 2 ºC Guardrail Obsolete?

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IPCC reference emissions scenarios, 2000—2100. A maximum concentration of 450 ppm carbon dioxide (~550 ppm CO 2 equivalent) in the Earth’s atmosphere is commonly cited as the limit at which average temperatures can be held at 2 ºC, and many emissions reduction proposals are based upon these two “upper bounds” targets. by Jack Rosebro.

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Devil in the Details: World Leaders Scramble To Salvage and Shape Copenhagens UNFCCC Climate Summit

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May, 2007 : An international team of researchers concluded that the ability of the Southern Ocean to absorb carbon dioxide had slowed by about 15% per decade since 1981 ( earlier post ), and projected that at the present rate of deterioration, it will have lost two-thirds of its ability to store carbon by 2050.

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