A recent scientific report about the correlation between global warming and solar activity has got a lot of press. It takes a very short recent time-period and shows no correlation over that period between solar output and temperature. I have not been able to access a copy of the report as yet so I cannot really comment but I wonder about their data sources. It is true that solar output has peaked in recent years but it is also true that temperature stopped rising in 1998. That seems a pretty good correlation to me! I also understand that CO2 levels don't correlate very well with temperature over that period either.
Chief Australian Greenie, Prof. Ian Lowe has "debunked" the Durkin film but makes some strange claims in the course of it. For instance, he says: "It claims medieval times were much warmer than today, but the science shows only some regions were briefly warmer and average global temperatures were lower". I have no idea what "the science" is that he refers to. The Mann "hockeystick" was held to represent "the science" of the history of global temperature until recently but it has now been shown to be essentially a hoax and the IPCC no longer mentions it. Lowe also says: "It displays, several times, a graph showing that average global temperature declined dramatically between 1940 and 1976 and claims this debunks the science. Our hemisphere actually warmed during that period." Lowe's use of hemisphere differences is as amusing as it is unwise for him. He fails to mention that there has been NO temperature increase in the Southern hemisphere since satellite temperature monitoring began about 25 years ago. If there has been any warming in that period, it has certainly not been global.
But I am a mere social scientist so will leave it to the physical scientists to do a real critique of the two above articles. Lowe's vague and unreferenced "ex cathedra" generalizations may be rather hard to get to grips with, however.
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