2017年7月至8月,使用微脉冲激光雷达与小型气溶胶后向散射探空仪在昆明开展了一个月的气溶胶垂直结构联合观测实验。对比2种仪器同步观测方法与探测后向散射比结果的异同,分析激光雷达和后向散射探空仪测量获得的气溶胶垂直分布特征。探测结果表明,两者具有较好的一致性,在1~4 km高度范围内,排除云层干扰后,2种仪器后向散射比测量结果的相关系数为0.87,方均根误差为0.752;观测实验表明,研制的微脉冲激光雷达为连续探测气溶胶垂直结构演化过程提供了有效手段,融合后向散射仪探空数据,可以减少微脉冲激光雷达数据反演中的假设参数,开展两者联合观测具有一定应用价值。

A micro-pulse lidar and a compact optical backscatter aerosol detector (COBALD) are deployed for the combined observation of aerosol vertical structures at Kunming from July to August 2017. The synchronous observation and comparison methods of these two instruments are introduced. The differences in the backscatter ratio profiles and vertical distribution characteristics of the aerosols, which are simultaneously measured by the lidar and COBALD, are analyzed. The observation results of the two instruments show good consistency with each other. The correlation coefficient between the backscatter ratio measured by lidar and that measured by COBALD is 0.87 in the absence of a cloud at a height of 1-4 km, and the corresponding root-mean-square error is 0.752. Atmospheric observation results indicate that the developed micro-pulse lidar is an effective tool for continuous detection of the evolution processes of aerosol vertical structures. Synchronous fusion with sounding data from the COBALD can reduce hypothetical parameters in the retrieve algorithm of lidar signals. In conclusion, the combined observation of these two instruments has certain application.