Better Communication Begets Trust : CJR

Cicerone and oter science leaders stressed that the highly publicized incidents have no significant bearing on the strong, urgent consensus among climate scientists that “climate change is occurring and is caused by humans.”
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Margot Roosevelt, an environment reporter for the Los Angeles Times, said scientists need to engage more actively in the public debate. She said her paper’s environment blog, Greenspace, was frequently barraged with comments—not from scientists, but from climate contrarians campaigning against acceptance of climate change findings.

From climate.nasa.gov: Cold snaps plus global warming do add up

That feeling of numbness in your toes, even inside your thickest boots, is not lying to you. It's been very cold so far this winter in most of the U.S. and many places at middle latitudes in the Northern Hemisphere. Washington, D.C., London and Seoul have already shoveled themselves out from major snowfalls. And over the course of 2009, average temperatures across some parts of the U.S. were cooler than the average temperature for a baseline period of 1951-1980.

To many people's confusion, these weather events happened against a backdrop of increasing man-made greenhouse gas levels in the atmosphere that are gradually warming the planet. But scientists stress this weather does not mean that those gases are no longer exerting a warming influence. Nor does it go against the grain of basic global warming theory. Cold snaps and bouts of natural cooling that could last years are expected naturally even as the climate continues on a long-term warming trend, forced by man-made emissions.
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Nature's wiggles
"The bottom line is, I don't find it extraordinary," Wallace said. "With or without anthropogenic (man-made) warming, you're going to have big variations in these patterns."

Funny, during warm spells, I don't recall NASA talking a whole lot about natural variability.

Everyone Who Knows What They're Talking About Agrees with Me - Reason Magazine

And everyone who doesn't wears a tin foil hat