By Richard Black
Environment Correspondent, BBC News website, in Vienna
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The reversal of "global dimming" has been proposed in some circles as an alternative explanation for climatic change, removing the need to invoke human emissions of greenhouse gases.
Dr Wild dismissed this picture. His analysis suggests that "global dimming" and the man-made greenhouse effect may have cancelled each other out until the early 1980s, but now "global brightening" is adding to the impact of human greenhouse emissions.
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"During the solar dimming we had really no temperature rise. And only when the solar dimming disappeared could we really see what is going on in terms of the greenhouse effect, and that is only starting in the 1980s."
Analyses of global temperature indicate that a sharp upward trend commenced in the early 1980s.
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more:
http://news.bbc.co.uk/2/hi/science/nature/4880328.stm