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Document Title: Contrails (DI01499) Photo by Carlye Calvin
Description: Jet aircraft flying at high altitudes often produce a trail of condensed vapor called a contrail. The mixing of hot exhaust gases from the engines with cold outside air causes ice crystals to form on particles in the exhaust. A contrail evaporates rapidly when the relative humidity of the surrounding air is low. If the humidity is high, a contrail may stay visible as cirrus-like clouds for many hours. This photo was shot at sunset in Boulder, Colorado.
Creditline: copyright University Corporation for Atmospheric Research, Photo by Carlye Calvin
Keywords: Carlye Calvin,cloud,clouds,contrail,contrails,DI01499,sunset,vapor,Phenomena
Filename: DI01499.tif