Publication of the IPCC AR4 in 2007 was received with international acclaim....Six and a half years later and a week before the release of the IPCC 5thAssessment Report (AR5), substantial criticisms are being made of leaked versions of the Report as well as of the IPCC process itself... What happened?
The IPCC was seriously tarnished by the unauthorized release of emails from the University of East Anglia in November 2009, known as Climategate. These emails revealed the ‘sausage making’ involved in the IPCC’s consensus building process, including denial of data access to individuals who wanted to audit their data processing and scientific results, interference in the peer review process to minimize the influence of skeptical criticisms, and manipulation of the media. Climategate was quickly followed by the identification of an egregious error involving the melting of Himalayan glaciers. These revelations were made much worse by the actual response of the IPCC to these issues. Then came the concerns about the behavior of the IPCC’s Director, Rachendra Pachauri, and investigations of the infiltration of green advocacy groups into the IPCC. All of this was occurring against a background of explicit advocacy and activism by IPCC leaders related to CO2 mitigation policies.
The IPCC does not seem to understand the cumulative impact of these events on the loss of trust in climate scientists and the IPCC process itself... Based upon early drafts of the AR5, the IPCC seemed prepared to dismiss the pause in warming as irrelevant ‘noise’ associated with natural variability. Under pressure, the IPCC now acknowledges the pause and admits that climate models failed to predict it... If the IPCC attributes to the pause to natural internal variability, then this begs the question as to what extent the warming between 1975 and 2000 can also be explained by natural internal variability. Not to mention raising questions about the confidence that we should place in the IPCC’s projections of future climate change.
- Scientist Judith Curry, "The IPCC's Inconvenient Truth"
Labels: Global Warming