摘要
针对2008年6月23日北京地区出现的冰雹天气过程,结合再分析资料(NECP)分析此次降水天气过程的天气背景,利用中国科学院大气物理研究所车载X波段双偏振天气雷达的差分相位移ΦDP、差分反射率ZDR、相关系数ρhV等偏振参量的图像和数值分布数据,得到此次强冰雹云的偏振参量结构和演变特征;然后利用模糊逻辑算法对强冰雹云粒子进行相态识别,结果与分析一致,表明双偏振雷达在强对流风暴云和降水微物理结构分析中具有重要作用。
This paper analyzed the environmental condition of the hailstorm process which occurred in Beijing on 23 June 2008 （based on the NECP data）.The vehicle-borne X-band dual-polarization radar system set up by the Laboratory of Cloud-Precipitation and Severe Storms （LACS）,Institute of Atmospheric Physics （IAP）,Chinese Academy of Sciences,can obtain several dual-polarization radar parameters,such as differential propagation phase ΦDP,differential reflectivity ZDR,and correlation coefficient ρhv.By analyzing the images and numerical distribution characteristics of the polarimetric parameters,we can get the structure of the polarimetric parameters and the evolution features of the strong hail cloud.Then,the results were consistent with the analysis after using fuzzy logic algorithm for hydrometeor classification to strong hail cloud particles.It showed the importance of dual-polarization radar in the strong convective storm clouds and the precipitation microphysical structure analysis.
出处
《安徽农业科学》
CAS
2014年第22期7511-7515,7536,共6页
Journal of Anhui Agricultural Sciences
基金
国家重点基础研究发展计划(973)项目(2014CB441403
2013CB430105)
国家自然科学基金资助项目(41205099)
贵州省黔科合项目(G[2013]4001)
关键词
冰雹云
双偏振雷达
偏振参量
相态识别
Hailstorm
Dual-polarization radar
Polarization parameters
Hydrometeor classification
