David Karoly’s rebuttal to the Phil Chapman article [our post on same] looks correct to me:
THE opinion piece by Phil Chapman (”Sorry to ruin the fun, but an ice age cometh”, Opinion, April 22) warns of an approaching ice age but contains a number of factual errors, misleading statements and incorrect conclusions.
…So what caused this rapid cooling during 2007, and also from 1998 to 1999, and from 1973 to 1974? What was common to all those periods? In each case, the common factor was a rapid change from El Nino to La Nina conditions, from warm temperatures in the eastern equatorial Pacific Ocean to cold temperatures in the same region, which has a significant effect on global climate patterns and global average temperature. La Nina is associated with below-normal global average temperature, and because of its influence, 2008 is likely to be about 0.3C cooler than the average of the previous few years.
…David Karoly is a professor in the University of Melbourne’s school of earth science
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