COMMENTARY/Climate panel on the hot seat

Full commentary (here).

The IPCC published its Fourth Assessment Report in 2007 predicting global warming will lead to widespread catastrophe if not mitigated, yet failed to provide the most basic requirement for effective climate policy: accurate temperature statistics. A number of weaknesses in the measurements include the fact temperatures aren't recorded from large areas of the Earth's surface and many weather stations once in undeveloped areas are now surrounded by buildings, parking lots and other heat-trapping structures resulting in an urban-heat-island effect.

Even using accurate temperature data, sound forecasting methods are required to predict climate change. Over time, forecasting researchers have compiled 140 principles that can be applied to a broad range of disciplines, including science, sociology, economics and politics.

In a recent NCPA study, Kesten Green and J. Scott Armstrong used these principles to audit the climate forecasts in the Fourth Assessment Report. Messrs. Green and Armstrong found the IPCC clearly violated 60 of the 127 principles relevant in assessing the IPCC predictions. Indeed, it could only be clearly established that the IPCC followed 17 of the more than 127 forecasting principles critical to making sound predictions.