摘要
根据偏振雷达原理，用Ｃ波段双线偏振天气雷达观测得到４例强对流雹暴演变过程的水平反射率Ｚ_Ｈ（ｄＢＺ）和差分反射率Ｚ_（ＤＲ）（ｄＢ）垂直剖面ＲＨＩ定量回波资料，分析了这些雹云不同演变阶段的回波参量和偏振特性的关系，说明Ｚ_Ｈ、Ｚ_（ＤＲ）双参量对判别降雹有着明显优势，用雨滴谱的Ｚ_Ｈ－Ｚ_（ＤＲ）分布边界关系对这些雹云回波进行判别降雹分析，给出我国用偏振雷达观测和识别冰雹的研究结果。
Detailed echo information of horizontal reflectivity ZH and differential reflectivity Z_(DR) were obtained by C-band dual linear polarization weather radar observations of four hailstorms in evolution process in August 1990. And based on polarization radar principles, we have analysed these echo parameters and polarization characteristic in their different evolution stages, and found Z_(DR) echo column is a distinct echo signature for discriminating fallhails. We have also used Z_H and Z_(DR) dual parameters technique to identify hails from mixed rains and hails, and alalysic the results.
出处
《大气科学》
CSCD
北大核心
2001年第1期38-48,共11页
Chinese Journal of Atmospheric Sciences
基金
国家"九五"攻关项目 96-020-01-07
国家自然科学基金 49975002
中国科学院"西部之光"共同资助
关键词
强对流雹暴
偏振特性
Z_(DR)回波
识别降雹
sever convective hailstorm
polarization property
differential reflectivity
Z_(DR)echo column identify
