喇曼激光雷达探测云及其附近气溶胶光学参量

Retrieval of aerosol and cloud optical parameters based on Raman lidars

为了研究喇曼激光雷达探测云与气溶胶相互作用相关光学参量的可行性,研制了一台607nm喇曼激光雷达。采用适当提高喇曼激光雷达配置的方法,提高了喇曼回波信号信噪比。通过实验取得了晴空少云天气下云和气溶胶的消光系数垂直廓线,给出了喇曼激光雷达观测云与气溶胶相互作用的个例分析,说明利用地基喇曼激光雷达,可以为研究云与气溶胶之间相互作用的物理过程提供基础数据,并指出正在研制的多波长喇曼-偏振激光雷达技术探测云与气溶胶相互作用的技术优势。结果表明,喇曼激光雷达具备定量探测中低自由对流层内薄云层和气溶胶消光系数的能力。

In order to measure atmospheric aerosols and cloud optical properties quantitatively, a 607nm Raman lidar was developed. The methods for measuring optical properties of aerosols ＆ cloud and detecting the interaction between aerosols and cloud by means of Raman lidar were discussed. The typical results of aerosol and cloud extinction coefficient were presented. A detailed study was performed for retrieval the aerosol optical parameters in the vicinity of clouds, which shows that a Raman lidar has the ability to detect the interaction of aerosols and clouds. Based on the result of the one-wavelength Raman lidar, a multiwavelength Raman lidar is under developing which should have more advantages in detecting the interaction of aerosols and