Weekend Australian ran an article by former senior adviser to President George W. Bush, Karl Rove, in which, contrary to his usual practice with articles written for the Wall St Journal, he states no outright opinions and suggests no answers because it was “an especially chaotic and jam-packed week” (see attached Rove Asks What is Happening in the US). I have much the same feeling about developments in Australia as well as in the US, both of which leave some important questions outstanding.
My previous Commentary on 18 Jan drew attention to the quite wide differences in the increase in global land temperature since 1979 between official government agencies and the satellite operated by the University of Alabama. I indicated that there should be no significant difference between the official agencies and the satellite increases and suggested that the higher increase published by the official agencies reflected significant errors by them. The comparative figures indicated that these errors could amount to 0.4C of the total increase of about 0.8C accepted by the IPCC et al since 1900. I noted also that the “natural” increase during the Pacific Decadal Oscillation from the late 1970s to around 2000 was about 0.4C and that, taking account also of errors, this means there could well have been little or no increase in global land temperature since 1900 due to human activity.