Volume 10, Number 33: 15 August 2007
Excerpt: In an intriguing Climate Change report in Science, Wentz et al. (2007) note that the Coupled Model Intercomparison Project, as well as various climate modeling analyses, predict an increase in precipitation on the order of 1 to 3% per °C of surface global warming. Hence, they decided to see what has happened in the real world in this regard over the last 19 years (1987-2006) of supposedly unprecedented global warming, when data from the Global Historical Climatology Network and satellite measurements of the lower troposphere have indicated a global temperature rise on the order of 0.20°C per decade. < > In discussing these embarrassing results, Wentz et al. correctly state that "the reason for the discrepancy between the observational data and the GCMs is not clear." They also rightly state that this dramatic difference between the real world of nature and the virtual world of climate modeling "has enormous impact," concluding that the questions raised by the discrepancy "are far from being settled." We agree. And until these "enormous impact questions" are settled, we wonder how anyone could conceivably think of acting upon the global energy policy prescriptions of the likes of Al Gore and James Hansen, who speak and write as if there was little more to do in the realm of climate-change prediction than a bit of fine-tuning.
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