Issue Date: November 28, 2011
Study Reduces Global Warming Estimate
The sensitivity of Earth’s climate to increasing levels of atmospheric carbon dioxide may be less than previously estimated. Climate sensitivity is a standard measure of how much Earth’s global surface air temperature will increase in response to a doubling of CO2 compared with preindustrial levels. The current best estimate of climate sensitivity is 3.0 °C and likely falls within the range of 2.0 to 4.5 °C, according to the Intergovernmental Panel on Climate Change (IPCC). . . .
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