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Image: Crow instability contrail

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Description: This Contrail inSan Francisco, California is a sample of w:Crow Instability.w:Crow instability is an inviscid line-vortex instability, named after its discoverer S. C. Crow. It is observed when the vortices caused by aircraft are being whirled from being otherwise straight contrails into spirals then donut-shaped rings.
Title: Crow instability contrail
Credit: Own work
Author: Brocken Inaglory
Usage Terms: GNU Free Documentation License
License: GFDL
License Link: http://www.gnu.org/copyleft/fdl.html
Attribution Required?: Yes

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