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Rep. Joe Barton, already implicated in an effort to mislead Congress about the science of climate change, is obviously choosing offence as his best possible defence, renewing his slander of Penn State climate scientist and “Hockey Stick” author Dr. Michael Mann.

As then-co-chair of the House Energy and Commerce Committee, Barton was responsible in 2006 for inviting the increasingly controversial statistician Edward Wegman to prepare a critique of Mann’s iconic hockey-stick-shaped graph illustrating a 1,000-year climate reconstruction. Although Barton has denied that he had a previous relationship with Wegman, implying that the subsequent report and hearing were not a set-up, John Mashey has documented the extensive direction that Barton provided to Wegman through Barton staff member Peter Spencer.

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“Independent” Hockey Stick analysis revealed as Republican set-up

The purportedly independent report that Dr. Edward Wegman prepared in 2006 for the Congressional Committee on Energy and Commerce was actually a partisan set-up, according to information revealed today.

Wegman, who had presented himself as an impartial “referee” between two “teams” debating the quality of the so-called Hockey Stick graph was, in fact, coached throughout his review by Republican staffer Peter Spencer. Wegman and his colleagues also worked closely with one of the teams (and especially with retired mining stock promoter Stephen McIntyre) to try to replicate criticism of the Hockey Stick graph, while at the same time foregoing contact with the actual authors of the seminal climate reconstruction.

The Hockey Stick refers to a graph (by Michael Mann, Raymond Bradley and Malcolm Hughes) that became a defining image of the Third Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). It also became a target for Steve McIntyre and the Guelph University economist Ross McKitrick, who since 2002, at least, has been a paid spokesperson for ExxonMobil-backed think tanks such as the Competitive Enterprise Institute (CEI) and the Fraser Institute.