• Aircraft-Induced Hole Punch and Canal Clouds : Inadvertent Cloud Seeding 

        Author(s):Heymsfield, Andrew J.; Kennedy, Patrick C.; Massie, Steve; Schmitt, Carl; Wang, Zhien; Haimov, Samuel; Rangno, Art
        The ice crystals can be produced by both turboprop and jet aircraft in and around supercooled liquid cloud layers. The crystals are produced by local adiabatic expansion at propeller tips at temperatures as warm as -8°C ...