In our summary of IPCC AR1 (1990) on radiative forcing, I noted that the logarithmic relationship and 4 wm-2 values were attributed to: Hansen et al (1988), which in turn cited Lacis et al 1981; and Wigley (1987) which is not presently available to me (or to Wigley himself) and appears not to have been […]
AR4 (chapter 1 on the History of Climate Science) contains the remarkable statement: The strong effect of cloud processes on climate model sensitivities to greenhouse gases was emphasized further through a now-classic set of General Circulation Model (GCM) experiments, carried out by Senior and Mitchell (1993). They produced global average surface temperature changes (due to […]
It is very difficult for the general public to understand that IPCC does not carry out independent due diligence. The answers of Michael Mann in 2003 to questions from Sen Inhofe are well worth re-reading in the present context. Mann says that it is “against the mission” of IPCC to “carry out independent programs” or […]
As an innocent bystander to the climate debates a couple of years ago, I presumed that IPCC would provide a clear exposition of how doubled CO2 actually leads to 2.5-3 deg C. The exposition might involve considerable detail on infra-red radiation since that’s relevant to the problem, but I presumed that they would provide a […]
Here is an account of an intriguing review carried out by NASA in response to a civilian Request for Review. NASA’s webpage on the Data Quality Act states: In accordance with the President’s Management Council, NASA implements the Office of Management and Budget (OMB) following requirements for quality of information. Section 515, “OMB Guidelines for […]
I’ve been seeking an engineering-quality exposition of how 2.5 deg C is derived from doubled CO2 for some time. I posted up Gerry North’s suggestion here , which was an interesting article but hardly a solution to the question. I’ve noted that Ramanathan and the Charney Report in the 1970s discuss the topic, but these […]
This topic has spilled into Unthreaded. The one comment that I would be inclined to make on this is that, if people are depending on water from glacier retreat in tropical and temperate settings, then it seems to me that their water supply would be equally diminished by glacier stabilization or advance, not just by […]
Climate Audit 