Skepticism on climate change

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THE MAIL brings an invitation to register for the 2009 International Conference on Climate Change, which convenes on March 8 in New York City. Sponsored by the Heartland Institute, a Chicago-based think tank, the conference will host an international lineup of climate scientists and researchers who will focus on four broad areas: climatology, paleoclimatology, the impact of climate change, and climate-change politics and economics. But if last year's gathering is any indication, the conference is likely to cover the climate-change waterfront. There were dozens of presentations in 2008, including: "Strengths and Weaknesses of Climate Models," "Ecological and Demographic Perspectives on the Status of Polar Bears," and "The Overstated Role of Carbon Dioxide on Climate Change." Just another forum, then, sounding the usual alarums on the looming threat from global warming? Actually, no. The scientists and scholars Heartland is assembling are not members of the gloom-and-doom chorus. They dispute the frantic claims that global warming is an onrushing catastrophe; many are skeptical of the notion that human activity has a significant effect on the planet's climate, or that such an effect can be reliably measured or predicted. Some point out that global temperatures peaked in 1998 and have been falling since then. Indeed, several argue that a period of global cooling is on the way. Nearly all would argue that climate is always changing, and that no one really knows whether current computer models can reliably account for the myriad of factors that cause that natural variability....