George Will: The Truth About Global Warming

In last week's NEWSWEEK, the cover story was a hymn to "The Thinking Man's Thinking Man." Beneath the story's headline ("The Evolution of an Eco-Prophet") was this subhead: "Al Gore's views on climate change are advancing as rapidly as the phenomenon itself." Which was rather rude because, if true, his views have not advanced for 11 years. (Click here to follow George F. Will)
There is much debate about the reasons for, and the importance of, the fact that global warming has not increased for that long. What we know is that computer models did not predict this. Which matters, a lot, because we are incessantly exhorted to wager trillions of dollars and diminished freedom on the proposition that computer models are correctly projecting catastrophic global warming. On Nov. 2, The Wall Street Journal's Jeffrey Ball reported some inconvenient data. Soon after the U.N.'s Intergovernmental Panel on Climate Change—it shared the 2007 Nobel Peace Prize with the Thinking Man's Thinking Man—reported that global warming is "unequivocal," there came evidence that the planet's temperature is beginning to cool. "That," Ball writes, "has led to one point of agreement: The models are imperfect."
Models are no better or worse than their assumptions, and Ball notes how dicey these assumptions can be: "The effects of clouds, for example, are unclear. Depending on their shape and altitude, clouds can either trap heat, warming the earth, or reflect it, cooling the planet." It gets worse: "The way that greenhouse gases affect cloud formation—and how clouds in turn affect temperature—remains a subject of debate. Different models treat these factors differently."
Some scientists say the cooling is a product of what Ball calls "the enigmatic ocean currents." Others say that even if the cooling continues for several decades, as some scientists think it might, warming will resume.
To read the rest of this article on Newsweek.com