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Contrails Over the Bay of Biscay, Spain and France – April 17th, 2013

45.1N 3.4W

April 17th, 2013 Category: Clouds, Image of the day

Spain and France – April 17th, 2013

Contrails hang in the air over the Bay of Biscay, between Spain (below) and France (right), creating criss-crossed patterns. Contrails, or condensation trails, usually occur when clouds form around the water vapor left in the air from the exhaust of passing airplanes, although they can also be triggered by the changes in air pressure in wingtip vortices or in the air over the entire wing surface.

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