Check out this quote from an IPCC scientist

Roger Pielke Jr.'s Blog: It Has Been Foretold

I am coming to the conclusion that there is something about the climate issue that makes people -- especially but not limited to academics and scientists -- completely and utterly lose their senses. The WMO statement is (yet) another example of scientifically unsupportable nonsense in the climate debate. Such nonsense is of course not going away anytime soon .

But because various unsupportable and just wrong claims are being advanced by leading scientists and scientific organizations, it would be easy to get the impression that on the issues of extreme events and climate change, IPCC science has a status similar to interpretations of Nostradamus and the Mayan calenders.

Roger Pielke Jr. - SourceWatch

In a February 2, 2010 televised interview on BBC TV, Dr. Pielke said his work for the Intergovernmental Panel on Climate Change had been misrepresented in a report produced by the IPCC. In particular, he cited a graph that was included in the report that showed a relationship between rising temperatures and the increasing costs of damages from weather-related occurrences. Dr. Pielke stated he was surprised to see the graph, "because there's no evidence in the literature to suggest that that relationship exists." "Even more troubling," Dr. Pielke said, was the fact that one of IPCC's reviewers asked the IPCC to check with him (Pielke) about this information. Pielke said that the IPCC responded by saying they thought he had changed his mind on the topic. Pielke maintains that this was not true.