青藏高原因特殊的高海拔、强烈的地面加热等特点，造成了其云降水的宏观和微观特征具有明显的特点。本项目以青藏高原那曲地区的对流云和降水为研究对象，利用青藏高原第三次大气科学试验获取的水汽、云和降水的垂直廓线数据，发展基于激光雷达、毫米波云雷达和微波辐射计的高原对流云和降水宏微观物理参数垂直廓线反演方法，融合反演得到云量、云底/云顶高度，云水/云冰含量、粒子平均尺度和云内空气上升速度廓线、地面观测雨滴谱和反演的雨滴谱垂直廓线；对这些产品进行对比检验，形成高原对流云主要参数数据集；统计分析云降水宏微观参数的统计特征、日变化和高原季风爆发前后的变化。为发展青藏高原云降水物理过程参数化方案、高原水份循环和云的气候效应提供依据。

Clouds play crucial role in both energy balance and water cycle of our Earth system. Properties of clouds and precipitation are unique in the Tibetan Plateau due to the high latitudes, strong surface heating, and so on. The project proposed here focuses on the study of convective clouds over NaQu region in Tibetan Plateau. By using the measurements of lidar, millimeter radar and microwave radiometer obtained from the third Atmospheric Science Experiement in the Tibetan Plateau, we will develop an optimal retrieval algorithm for convective clouds, including the cloud fraction, cloud base/top height, profiles of air vertical velocity in clouds, profiles of cloud and precipitation droplet sizes, and profiles of cloud liquid water content. By combining these retrieved cloud and precipitation properties and those obtained from ground observations, we can compare and evaluate the cloud and precipitation retrievals and then generate a long-term cloud and precipitation dataset for convective clouds over Tibetan Plateau. With this dataset, we can carry out statistical analysis about the change of water vapor, cloud liquid water content, precipitation water content, and diurnal cycle of cloud dynamical and microphysical parameters between before and after onset of monsoon over Tibetan Plateau. These analyses can help us obtain the characteristics of particle size distributions of cloud droplets and precipitation particles, and the characteristics of cloud and precipitation properties for studied regions. This study will provide bases for further development of cloud and precipitation parameterization schemes over Tibetan Plateau.