Staggering 20% Increase in Surface Solar Radiation Due to Cleaner Air In Just One Decade

"Clean-air policies in developing countries have resulted in reduced levels of anthropogenic atmospheric 
aerosol pollution. Reductions in aerosol pollution is thought to result in a reduction in haze and 
cloud layers, leading to an increase in the amount of solar radiation reaching the surface, and ultimately, 
an increase in surface temperatures. There have been many studies illustrating coherent relationships 
between surface solar radiation and temperature however, a direct link between aerosol emissions, 
concentrations, and surface radiation has not been demonstrated to date. Here, we illustrate a coherence 
between the trends of reducing anthropogenic aerosol emissions and concentrations, at the interface 
between the North-East Atlantic and western-Europe, leading to a staggering increase in surface 
solar radiation of the order of ∼20% over the last decade."

Abstract here.

Clean air legislation really got going in the late 1970s.

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