I know your Mother told you not to look at the sun but maybe it is about time the IPCC set aside this maternal advice and began considering that variations in solar radiation may have something to do with the fluctuations in earth’s temperature.
It has long been the IPCC’s contention that while there have been minor fluctuations in the energy output from the sun this is more than compensated for by magnification of the so called ‘greenhouse effect’ by increases in atmospheric carbon dioxide produced by human activity.
A paper produced by the National Academy of Science has challenged that assertion. Using Beryllium 10 and Carbon 14 isotopes (found in ice cores and tree rings) as proxies for Solar radiation, the academy has determined that Solar radiation at the end of the 20th Century is the highest it has been in the past 9,400 years.
But let us be careful. Just because we are seeing correlation with temperature rise does not mean we have causality, however this data surely merits serious consideration in the overall study of climate by the IPCC. Perhaps it’s the old cynic in me, but somehow I don’t think they will bother.
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