Cirrus cloud

From Biocrawler, the free encyclopedia.

This article is about Cirrus clouds, for other meanings see Cirrus.

Cirrus (Lat. 'wisp of hair') is a type of cloud.

Cirrus clouds are composed of ice crystals and shaped like hairlike filaments. They are formed at an altitudes above 16,500 feet. If there are many cirrus clouds in the sky it may be a sign that a frontal system is approaching. Cirrus clouds can also be the remnants from a thunderstorm.

See also

• weather
• atmosphere

External link

• Photograph of cirrus clouds illuminated by sunset (http://wetterchronik.de/mm/sonne/20040426u.htm)
• cirrus clouds on the planet Mars (http://marsrovers.jpl.nasa.gov/gallery/press/opportunity/20041213a/merb_sol290_clouds-B313R1_br.jpg)fr:Cirrus

nl:Cirrus pl:Cirrus fi:Cirruspilvi

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Cirrus_cloud (http://en.wikipedia.org/wiki/Cirrus_cloud) version history (http://en.wikipedia.org/w/index.php?title=Cirrus_cloud&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

---