Michael Kelly has a letter in the Times responding to the Chief Scientific Advisers' call to trust the IPCC.
Sir, In any form of exact science or engineering, having a discrepancy of a factor of two between theory and experiment would be a source of grave embarrassment. This is not so with climate science where the climate models have overestimated the effect of increasing CO2 on the temperature of the earth’s atmosphere by a factor of two over the past 25 years.
For this reason, the divergence between the predictions of theoretical models and real-world data is growing. If the forthcoming fifth assessment report does not address this problem and its implications in an open and candid manner, the validity of the report will be widely questioned.
Kapow.