Not behaving quite as expected (Image: Paul A. Souders/Corbis)
IF NEW satellite data can be trusted, changes in solar activity warmed the Earth when they should have cooled it.
of Imperial College London studied 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, and ultraviolet radiation dropped four times as much as predicted.…
