甘肃雹暴云发展演变规律的模拟研究

Statistic analyses a large of hailstorm echoes show that the differences exist in the cloud top height, the echo area, the intense core height and the thickness when strong convective develops and evolves with the reflectivity Ze>30dBz of their radar echo for different hailcloud process. The statistics attained the intensity structure of hailstorm echoes and their parameters of echo characteristics. The parameters of echo characteristics can be used to the hail process as criteria for identifying hailstorms among severe thunderstorm evolution, is high accuracy for identifying strong hailstorms.. A new three-dimensional model of dynamics-electrification, modified from two-dimensional, axisymmetric, dynamic-electrification cloud model and a three dimensional dual-paramter hail cloud model, has been developed to investigate the spatial and temporal development of structure within the thunderstorm, analyze the interaction between mircophysics and electrification, on growth of hail particals. Fuethermprn, using two-dimensional dynamic-electrification cloud model, the development mechanisms of corona layer under thunderstorm and effect chaff seeding on electric characteristics are analyzed. .

用三维冰雹云数值模式结合雷达观测雹暴云发展演变的回波特征参量和雷电结构进行数值模拟研究，增强认识其动力结构与宏微观时空变化和相互作用的机理，提出适应我国雹暴演变机理的概念模型。提高测量研究冰雹云和预测灾害天气的水平，为强对流数值理论和人工影响天气提供科学依据。