I haven’t chased all the links down, but this could be inconvenient if your wagon is hitched to the anthropogenec global warming bandwagon. Seems the sun’s output has not been so steady – and visible radiation isn’t the thing to watch anyhow.
How big a deal is this indirect cloud effect? Huge, actually. In just 5 years it was responsible for a 2% decrease in low clouds (the kind that reflect incoming solar radiation by day) which, in turn, equates to an increase in surface warming of 1.2 Wm-2 from incident radiation — equivalent to some 85% of the IPCC’s estimate for the effect of all carbon dioxide increase since the Industrial Revolution.
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