A Feather in the Sky

August 17, 2008

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Provided by: Bernard Durand
Summary Author and Editors: Bernard Durand, Jim Foster

The photo above shows a curiously shaped cirrus cloud taking the form of the object often used to describe cirrus (feather like). It was observed above Le Sauze du Lac, France on July 31, 2006. Cirrus type clouds are composed of small ice crystals that are typically widely dispersed, making these clouds appear somewhat transparent. The cloud deck closer to the horizon is also cirriform in nature (cirrocumulus).

Photo Details: Canon EOS 5D camera, 24 mm lens, 100 ISO, 1/125 second exposure, f/11.