'The hockey stick is broken' | Gristmill: The environmental news blog | Grist - 1 views
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Study of the past can be informative for scientists, but it is not explanatory of the present nor is it predictive of the future.
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The infamous "Hockey Stick" graph was featured prominently in the IPCC TAR Summary for Policymakers.
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Two Canadians, an economist and a petroleum geologist, took it upon themselves to verify this proxy reconstruction by getting the data and examining the methodology for themselves. They found errors in the description published in Nature of the data used -- errors that prevented them from duplicating the study. Mann et al., the hockey stick's creators, published a correction in Nature, noting where the description did not match what had actually been done.
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