Measurement of water cloud particle size with a dual-polarization pulsed bistatic lidar
Measurement of water cloud particle size with a dual-polarization pulsed bistatic lidar
复制标题
使用双偏振脉冲双基地激光雷达测量水云粒径
DOI：
10.1007/bf02931738
复制
发表时间：
2001
期刊：
影响因子：
1.2
通讯作者：
A. Shimizu
中科院分区：
文献类型：
--
作者：
N. Sugimoto;I. Matsui;A. Shimizu
研制了一台用于测量低云底部水云粒子尺寸的双基地激光雷达。激光雷达使用532 nm的脉冲Nd：YAG激光器和具有位于合适散射角的偏振分析仪的接收器。根据单次散射Mie理论，从散射光的偏振分量的比率导出云粒子尺寸（假定尺寸分布的模式半径）。实验是在西北太平洋的研究船米拉伊上进行的。测量了海洋性积云和层云底部的颗粒大小，观察了积云和层云内部结构的差异。通过改变观测散射角，研究了多次散射的影响。当侵彻深度小于50 m时，影响不显著。
A new bistatic lidar was developed for measuring water cloud particle size at the base of lower clouds. The lidar uses a pulsed Nd:YAG laser at 532 nm and a receiver having a polarization analyzer located at a suitable scattering angle. Cloud particle size (mode radius of the assumed size distribution) was derived from the ratio of the polarization components of the scattered light based on the single scattering Mie theory. The experiment was performed on board the research vessel Mirai in the northwestern Pacific. Particle size at the bottom of maritime cumulus and stratus was measured, and the difference between the internal structures of cumulus and stratus was observed. The effect of multiple scattering was studied by changing the observing scattering angle. The effect was not significant when the penetration depth was less than 50 m.