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

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D₀)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；D₀主要集中在0.8～1.6 mm范围内，Z_C标准值在D₀<1.2 mm范围内随着D₀的增大而逐渐减少，D₀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。

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

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 D₀ 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). D₀ is mainly in the range of 0.8-1.6 mm, and Z_C standard deviation decreases with the increasing of D₀ in the range of D₀ less than 1.2 mm. Z_C standard deviation of D₀ 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.