Sun's activity flies in face of climate expectations

IF NEW satellite data can be trusted, changes in solar activity warmed the Earth when they should have cooled it. Joanna Haigh of Imperial College London studied satellite measurements of solar radiation between 2004 and 2007, when overall solar activity was in decline. The sun puts out less energy when its activity is low, but different types of radiation vary to different degrees. Until now, this had been poorly studied. Haigh’s measurements showed that visible radiation increased between 2004 and 2007, when it was expected to decrease,
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