Nancy's Almanac for Oct. 31, 2013: How real is man-made climate change? - Omaha.com
Published Thursday, October 31, 2013 at 1:00 am / Updated at 4:53 pm
Nancy's Almanac for Oct. 31, 2013: How real is man-made climate change?

The natural variation of weather and climate is a powerful force in nature.

Researchers believe the 2012 flash drought that devastated Nebraska and its neighbors was a result of natural variation. There was no obvious fingerprint of climate change in that drought.

Likewise, the preliminary studies of the Boulder, Colo., flooding also point to natural variation, with no indication that climate change was at play.

Climate change is not the bogeyman behind ever disaster.

So how real is man-made climate change?

Scientists now are 95 percent to 100 percent certain that human activity is the primary cause of the warming that has occurred since the 1950s, according to a September 2013 report by the Intergovernmental Panel on Climate Change.

As a point of context: That's a greater degree of certainty than the National Weather Service had on Tuesday morning when it was forecasting rain for Wednesday in Omaha.

On Tuesday morning, the weather service was projecting a 90 percent chance of rain in the Omaha area.

Not surprisingly, it rained Wednesday in Omaha.


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