Galileo faced the same sort of consensus.
That links to this Wall Street Journal Op-Ed by Richard S. Lindzen, the Alfred P. Sloan Professor of Atmospheric Science at MIT, which I highly commend to your attention. Some excerpts:
Even among those arguing, there is general agreement that we can’t attribute any particular hurricane to global warming. To be sure, there is one exception, Greg Holland of the National Center for Atmospheric Research in Boulder, Colo., who argues that it must be global warming because he can’t think of anything else. While arguments like these, based on lassitude, are becoming rather common in climate assessments, such claims, given the primitive state of weather and climate science, are hardly compelling.
A general characteristic of Mr. Gore’s [Al Gore, star of the movie An Inconvenient Truth] approach is to assiduously ignore the fact that the earth and its climate are dynamic; they are always changing even without any external forcing. To treat all change as something to fear is bad enough; to do so in order to exploit that fear is much worse. Regardless, these items are clearly not issues over which debate is ended–at least not in terms of the actual science.
…[However,] there has been an intense effort to claim that the theoretically expected contribution from additional carbon dioxide has actually been detected.
Given that we do not understand the natural internal variability of climate change, this task is currently impossible. Nevertheless there has been a persistent effort to suggest otherwise, and with surprising impact. Thus, although the conflicted state of the affair was accurately presented in the 1996 text of the Intergovernmental Panel on Climate Change, the infamous “summary for policy makers” reported ambiguously that “The balance of evidence suggests a discernible human influence on global climate.” This sufficed as the smoking gun for Kyoto.
The next IPCC report again described the problems surrounding what has become known as the attribution issue: that is, to explain what mechanisms are responsible for observed changes in climate. Some deployed the lassitude argument–e.g., we can’t think of an alternative–to support human attribution. But the “summary for policy makers” claimed in a manner largely unrelated to the actual text of the report that “In the light of new evidence and taking into account the remaining uncertainties, most of the observed warming over the last 50 years is likely to have been due to the increase in greenhouse gas concentrations.“
…the National Academy of Sciences issued a brief (15-page) report responding to questions from the White House. It again enumerated the difficulties with attribution, but again the report was preceded by a front end that ambiguously claimed that “The changes observed over the last several decades are likely mostly due to human activities, but we cannot rule out that some significant part of these changes is also a reflection of natural variability.“
…More recently, a study in the journal Science by the social scientist Nancy Oreskes claimed that a search of the ISI Web of Knowledge Database for the years 1993 to 2003 under the key words “global climate change” produced 928 articles, all of whose abstracts supported what she referred to as the consensus view. A British social scientist, Benny Peiser, checked her procedure and found that only 913 of the 928 articles had abstracts at all, and that only 13 of the remaining 913 explicitly endorsed the so-called consensus view. Several actually opposed it.
Emphasis mine. That’s your consensus: Weasels’ words which translate to, “We don’t really know, but we all believe it anyway.”
It reminds me of Supreme Court Justice William O. Douglas writing that “specific guarantees in the Bill of Rights have penumbras, formed by emanations from those guarantees that help give them life and substance.” It seems like the translation would be “there is a soupçon of a hint of a possibility of a faint aura”, in both cases.
Thanks to National Center.