对探测大气气溶胶和云雾粒子的激光雷达的关键参量——激光雷达比问题进行了详细的讨论,利用实际大气气溶胶和云雾粒子的光学特性对0.532 μm和1.064 μm波长上的激光雷达比进行了计算分析,得到了各种气溶胶粒子组份和典型的集合状态以及云雾粒子的激光雷达比。发现激光雷达比和粒子的物理、光学性质密切相关,不同种类的粒子的激光雷达比有巨大的差异,并且两个波长上激光雷达比的相互关系也不相同,这些结果为激光雷达探测大气气溶胶和云雾粒子提供了依据。

Lidar ratio problem is discussed for atmospheric aerosol and cloud particle dectection. Lidar ratios at 0.532 μm and 1.064 μm for all kinds of atmospheric aerosol and cloud particles are evaluated according to up-to-date database of aerosol optical and micro-physical properties. It is found that lidar ratios depend strongly on physical and optical properties of particles, and they could be very different for various types of particles. Lidar ratios at 0.532 μm and 1.064 μm present different relationship. For some particles the ratios at two wavelengths are close to each other, for some particles the ratio at 0.532 μm is larger, and for some particles the ratio at 0.532 μm is smaller. The results could be applied in practical lidar detection of atmospheric aerosol and cloud particles.