The influence of jet-engine contrails

Dr. David Travis and his colleagues at the University of Wisconsin-Whitewater suggested the fluctuation in temperature was caused by the absence of jet-engine contrails (the ice- crystal streams that form around the particles expelled into the air by passing planes) during the three days of quiet skies. In regions with significant airline traffic, contrails may act like artificial cirrus clouds, preventing temperatures from climbing during the day and from dropping at night.
source: Planes, Air Pollution and Global Warming See also XlnkS4C4

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