Airline traffic may help create an icy haze that's brightening U.S. skies
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So the scientists dug deeper, and in a provocative new analysis, not yet published, Long suggests that a high-altitude "ice haze," created by water and other emissions from aircraft, is responsible. "I'm talking about a sub-visual contrail-generated haze of ice, which we do not classify as a cloud but gives blue sky more of a whitish tint." Long said.
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The findingââ¬âif verifiedââ¬âcould mean that we are in essence already conducting a geoengineering experiment on the atmosphere, adding ice particles that change the way solar radiation reaches Earth's surface. Understanding the overall impact of those changes on warming or cooling at the surface will take more research, Long said.Â
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http://www.esrl.noaa.gov/news/2015/121515.html
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