秦皇岛地区雨滴谱仪和雷达探测的反射率因子差异分析研究

Analysis of radar reflectivity factor deference between radar and parsival disdrometer measurements in Qinhuangdao

利用布设在秦皇岛市抚宁地区的OTT Parsivel激光雨滴谱仪和卢龙地区S波段天气雷达,对2017—2019年4—9月共23次降水过程进行了观测,并分析了基于雨滴谱参数(滴谱粒子数N(D)和粒子直径大小D 0)计算的雷达反射率因子Z D和雷达探测的雷达反射率因子Z R的差异Z C。结果表明,N(D)主要集中在130~530个范围内,Z C标准差随着N(D)的增大而逐渐减少;D 0主要集中在0.8~1.6 mm范围内,Z C标准值在D 0<1.2 mm范围内随着D 0的增大而逐渐减少,D 0在1.2~1.6 mm范围内趋于稳定;Z D主要集中在15~40 dBZ范围内,Z C标准差在15~35 dBZ范围内随着Z D值增大而减小。

By using OTT Parsivel raindrop size distribution data in Funing area and S-band Doppler weather radar in Lulong area of Qinhuangdao,23 precipitation processes were observed from April to September during 2017-2019,and the difference of reflectivity factor Z C between the radar reflectivity factor Z D were calculated based on number of particles in the drop spectrum N(D)and particle diameter size D 0 and radar reflectivity factor Z R were analyzed.Results show that N(D)is mainly concentrated in the range of 130-530.Z C standard deviation decreases with the increasing of N(D).D 0 is mainly in the range of 0.8-1.6 mm,and Z C standard deviation decreases with the increasing of D 0 in the range of D 0 less than 1.2 mm.Z C standard deviation of D 0 is stable in the range of 1.2-1.6 mm.Z D is mainly concentrated in the range of 15-40 dBZ,and Z C standard deviation decreases in the range of 15-35 dBZ with the increasing of Z D.