![]() 5 Furthermore, since the theory of global warming assumes maximum warming at the poles, why have average temperatures in the Arctic dropped by 0. Measurements made by means of satellites show no global warming but a cooling of 0.13☌ between 19. Most members of the Intergovernmental Panel on Climate Change believe that current climate models do not accurately portray the atmosphere-ocean system. Expert credibility in climate change William R. Policymaking should be guided by proved fact, not speculation. I have never witnessed a more disturbing corruption of the peer-review process than the events that led to this IPCC report.” 4 documenting actual impacts of climate change, (5) those deal-ing with paleoclimate change, and (6) those proposing mitiga-tion strategies. ( 1) employed suspect methodology that treated publication metrics as a surrogate for expertise. This led Dr Frederick Seitz, former head of the United States National Academy of Sciences, to write, “In more than sixty years as a member of the American scientific community. What happened was that the policymakers’ summary (which became the “take home message” for politicians) altered the conclusions of the scientists. 3 The original draft document did not say this. McMichael and Haines quote the 1995 report of the Intergovernmental Panel on Climate Change (IPCC), which is widely believed to “prove” that climate change induced by humans has occurred. ![]() ![]() We do not agree.” 2 Those who have signed the letter represent the overwhelming majority of climate change scientists in the United States, of whom there are about 60. They are based on the unsupported assumption that catastrophic global warming follows from the burning of fossil fuel and requires immediate action. “The policy initiatives derive from highly uncertain scientific theories. A letter signed by over 50 leading members of the American Meteorological Society warned about the policies promoted by environmental pressure groups. Whether most scientists outside climatology believe that global warming is happening is less relevant than whether the climatologists do. Experts from across the university, including key authors and contributors to the IPCC’s report voiced concerns over the impact of delay. Although preliminary estimates from published literature and expert surveys suggest striking agreement among climate scientists on the tenets of anthropogenic climate change (ACC), the American public expresses substantial doubt about both the anthropogenic cause and the level of scientific agreement underpinning ACC. Authors William R L Anderegg 1, James W Prall, Jacob Harold, Stephen H Schneider Affiliation 1 Department of Biology, Stanford University, Stanford, CA 94305, USA. 1 In his editorial Smith asserts, “virtually all scientists agree that global warming is happening.” Global warming is now joining the list of “what everyone knows.” Expert credibility in climate change Proc Natl Acad Sci U S A. Editor-The apocalyptic tone that Smith adopted in relation to the environment bears little relation to reality.
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