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Conical Graupel

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  • 1 National Center for Atmospheric Research, Boulder, Colo. 80302
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Abstract

The mechanism of origin of conical graupel is an important problem, since this graupel form is a common stage in rain and hall formation. Previous theories are reviewed and found to be questionable as general mechanisms. Another mechanism is proposed, whereby the conical graupel grow, attached at their tips to the undersides of planar snow crystals, and break oil within the cloud.

Abstract

The mechanism of origin of conical graupel is an important problem, since this graupel form is a common stage in rain and hall formation. Previous theories are reviewed and found to be questionable as general mechanisms. Another mechanism is proposed, whereby the conical graupel grow, attached at their tips to the undersides of planar snow crystals, and break oil within the cloud.

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