National Meteorological Centre
FY-4A卫星闪电与地基ADTD(Active Divectory Topology Diagrammer)闪电资料对于研究暴雨强对流天气具有一定的指示意义,通过对四川冕宁暴雨个例的研究,对比分析了这两种闪电资料的差别,设计了将两种闪电资料引入数值预报模式的多组数值试验。结果表明,(1)两种闪电资料在不同地区有不同的探测效果,ADTD闪电资料范围更广且分散,FY-4A卫星监测到的闪电数量更密集、分布更集中；两种闪电资料在进入模式之后所转化成的代理雷达回波具有很好的一致性；对于低频次的闪电来说,ADTD闪电定位仪可能比FY-4A闪电成像仪探测效率更高；(2)引入任何一种闪电资料都对降水预报具有正效果,其中ADTD闪电资料的应用对于短时降水预报准确率的提高更为有效。(3)两种闪电资料对于云微物理量的调整作用,在不同的区域有不同效果,说明这两种闪电资料的分布不完全一致,揭示出这两种闪电资料具有一定的互补性。
The lightning data of FY-4A satellite and ADTD (Active Divectory Topology Diagrammer) are significant for the study of rainstorm and severe convection weather. This paper compares and analyzes the difference between the two lightning data through a case study of rainstorm in MianNing, SiChuan Province, a series of numerical experiments are designed to introduce two kinds of lightning data into the numerical prediction model. The main conclusions show as follows：(1)Two kinds of lightning data have different detection effect in different areas. The ADTD lightning data are more extensive and scattered, and the number and distribution of lightning detected by FY-4A satellite are more intensive. There is a good consistency between the two kinds of surrogate radar echo transformed by two kinds of lightning data . For low frequency lightning, the ADTD lightning localizer may be more efficient than Fy-4A LMI. (2)The introduction of these two types of lightning data has positive effects on precipitation forecast, and the application of ADTD lightning data is more effective for improving the accuracy of short-time precipitation forecast.(3)The two types of lightning data have different effects on the adjustment of cloud microphysical quantities in different regions. This shows that the distribution of the two types of lightning data is not completely consistent, and it shows that the two types of lightning data are complementary to each other.