Abstract
It was dry in Hebei Province in winter of 2017, with less snow. But on November 25, 2017, snowfall occurred in Zhangjiakou and Chengde areas of Hebei Province by the influence of low trough-cold front weather process. Hebei Artificial Weather Office used cloud physics model products issued by National Artificial Weather Office for timely and accurate early warning, and successfully implemented artificial snowfall enhancement operation by an aircraft. Aircraft was King of the Air 350, and carried series of cloud physics and environment detection instruments produced by SPEC Company. In this paper, the case was analyzed, and technical conditions for artificial snowfall enhancement were summarized from water content and vertical velocity in clouds by combining several rainfall processes from winter of 2017 to spring of 2018.
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