大陆性浓积云云滴谱离散度影响因子的飞机观测研究

利用2020年7月30日山西省人工增雨防雷技术中心在山西省忻州地区开展的大陆性浓积云飞机探测资料，分析了积云微物理参量、云滴谱离散度随时间和高度的变化以及云滴谱离散度的影响因子。结果表明，该大陆性浓积云云滴谱离散度随高度的增加先递增后递减，但变化范围较小。云滴谱离散度随数浓度、含水量增大而逐渐收敛，呈弱正相关关系；离散度与体积平均半径的相关性随体积平均半径的增大由正转负，与垂直速度呈现正相关关系。云中碰并过程对云滴谱离散度及其影响因子影响较大，建议未来云滴谱离散度的参数化增加对碰并过程的考虑。

Aircraft observations of influencing factors of cloud droplet relative dispersion in continental cumulus congestus clouds

By using the aircraft observation data from the artificial precipitation and lightning protection technology center in Shanxi Province on July 30, 2020, the time and height variation of microphysical properties such as cloud droplet relative dispersion and the influencing factors of cloud droplet relative dispersion were analyzed. Results show that the relative dispersion of the continental cumulus congestus clouds first increases and then decreases with the increasing of height, but the range is small. The relative dispersion is positively correlated with cloud droplet number concentration and liquid water content.The correlation between the relative dispersion and the mean-volume radius changes from positive to negative with the increasing of the mean-volume radius, and the correlation between the relative dispersion and the vertical velocity is positive. Given the influence of collision-coalescence process in precipitation clouds on relative dispersion, it is suggested that the cloud droplet relative dispersion should be parameterized with the consideration of the collision-coalescence process in the future.