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A Case Simulation Analysis and Radar Detection on Seeding Opportunity of Rainfall Enhancement for Convective Cloud

Wang Bin1 Xiang Yuchun2 Zhang Hongyan3(1.Institute of Heavy Rain,CMA,Wuhan 430074;2.Weather Modification Office of Hubei Province;3.Operational Office,Hubei Provincial Meteorological Bureau)  
Analysis and identification on seeding opportunity for enhancing rainfall in a convectional precipitation case occurred in northwestern Hubei,a mountainous area,are introduced.Firstly,based on a fully elastic three-dimensional and dual-parameter cumulus cloud numerical model,a series of sensitive modeling tests on seeding AgI agent in a variety of time is conducted to analyze how various seeding time affects the result of precipitation enhancement and its precipitation physical mechanism.It is concluded that the appropriate seeding opportunity is at the early period when a convective cloud is developing after its original formation.According to the results of simulation analysis in this case and based on radar data,the method of detecting appropriate seeding opportunity is discussed by analyzing forming and developing characteristics of convective cell echoes in the entire precipitation process.
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