Aerosol and vertical-velocity profiling and cloud glaciation observations during COPS

在为期三个月的COPS期间进行了多波长气溶胶激光雷达和多普勒激光雷达测量后，我们开始对边界层和自由对流层观测到的气溶胶进行光学和微物理特征的数据分析。我们的工作重点是从六波长气溶胶激光雷达观测中检索微物理特性（如粒子数浓度、体积浓度），并从多普勒激光雷达观测中分析上层对流边界层（上升气流和下降气流、日循环、案例研究）的垂直速度场。这些产品是建模组最感兴趣的。对边界层和自由对流层（气溶胶层、高积云和混合相云、卷云）的垂直速度数据进行统计分析。我们将进一步关注对流层中层高积云（嵌入在我们在cop期间检测到的撒哈拉沙尘或森林火灾烟雾层中）中不均匀冰形成（云冰川）的鲜为人知的过程。我们将分析这些情况下，作为云顶温度和气溶胶类型（烟雾或灰尘）的函数的冰层的出现。

After carrying out multiwavelength aerosol lidar and Doppler lidar measurements during three months of COPS, we begin the data analysis with the optical and microphysical characterization of the aerosols observed in the boundary layer and the free troposphere. Focus of our work is the retrieval of microphysical properties (e.g., particle number concentration, volume concentration) from six–wavelength aerosol lidar observations, and the analysis of vertical–velocity fields in the upper convective boundary layer (in updrafts and downdrafts, diurnal cycle, case studies) from Doppler lidar observations. These products are of outmost interest for modelling groups. A statistical analysis of the vertical–velocity data in the boundary layer and in the free troposphere (in aerosol layers, altocumulus and mixed–phase clouds, cirrus) will be performed, too. We will further focus on the poorly understood process of heterogeneous ice formation (cloud glaciation) in mid tropospheric altocumulus (embedded in the Saharan dust or forest fire smoke layers that we detected during COPS). We will analyze these cases with respect to the occurrence of ice layers as a function of cloud top temperature and aerosol type (smoke or dust).