Monday, December 07, 2009

The Scientific Tragedy of Climategate

Consider researcher Tom Wigley’s email describing his adjustments to mid-20th century global temperature data in order to lower an inconvenient warming "blip." According to the global warming hypothesis, late 20th century man-made warming was supposed to be faster than earlier natural warming. But the data show rapid "natural" warming in the 1930s. Adjusting the 1940 temperature blip downward makes a better-looking trend line in support of the notion of rapidly accelerating man-made warming. Collecting and evaluating temperature data requires the exercise of scientific judgment, but Wigley's emails suggest a convenient correction of 0.15 degree Celsius that fits the man-made global warming hypothesis. The adjustment may be reasonable—changes in instrumentation might need to be accounted for—but all raw data and the methodologies used to adjust them should be publicly available so others can check them to make sure. In another set of troubling emails, the CRU crew and associates discussed how to freeze out researchers and editors who expressed doubts about the man-made climate change. For example, an email from CRU’s leader Phil Jones saying that he and Kevin Trenberth would keep two dissenting scientific articles out of the United Nations Intergovernmental Panel on Climate Change’s next report "even if we have to redefine what the peer-review literature is!" In addition, the CRU crew evidently plotted to remove journal editors with whom they disagreed and suppress the publication of articles that they disliked. If they actually succeeded, this compounds the tragedy. Eliminating dissenting voices distorts the peer review process and the resulting scientific literature. The world's policymakers rarely enjoy access to complete information, but the Climategate emails suggest they have been robbed of the chance to get the best information available...read more

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