Brighter sun adds to fears of climate change - Sunday Times - Times Online
This report seems very significant:
Wild said: “Sunshine levels had been decreasing by 2% a decade between 1960 and 1980 — a total decline of about 6%. Now they are going up again. Perhaps this is why our Swiss glaciers are melting.”
A 6% increase in the amount of solar radiation reaching earth would have a powerful impact on climate, especially when added to the warming effect of greenhouse gases which have already raised global temperatures by about 0.6C. Researchers predict an additional rise of at least 1.5C by 2050.
Such rises could be disastrous for agriculture, wildlife and human settlements in many regions, especially the tropics. But scientists warn they may have to revise these calculations sharply upwards if the impact of “global brightening” has to be factored