Friday, July 30, 2010

The Trajectory of Global Warming

The Economist has published this clear chart of global temperatures by decade.
Pay attention to the confidence range, which is similar to what pollsters call the margin of error. As you can see in the chart, the confidence range (which is 95 percent) is considerably smaller than the rate of change over the last several decades, which means that that it is extremely unlikely that the increase in temperatures is attributable to random fluctuations.

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