摘要
根据米氏散射理论，对卷云消光特性、有效激光雷达比与波长之间的关系进行了模拟研究，并基于三波长激光雷达系统于2011年1月至2012年10月在合肥西郊的观测资料，计算了卷云不同波长的有效激光雷达比。理论和实验结果均表明，对三波长激光雷达系统所用的355，532，1064nm三个波长而言，卷云的消光系数与波长无关，有效激光雷达比随着波长的增大而增大。合肥地区的卷云有效激光雷达比主要分布在10～70sr之间，它们对应三个波长上的均值分别为（21．0±9．3）sr，（29．4±11．7）sr，（38．1±11．4）sr。355nm波长的卷云有效激光雷达比秋季最低，而532nm和1064nm波长则秋季最高。
The simulation study is conducted based on Mie scattering theory as well as the relationship between the cirrus extinction characteristics, the effective lidar ratio and wavelengths. Data of observation is measured to calculate the effective lidar ratios of different wavelengths by three-wavelength lidar system in the western suburbs of Hefei from January 2011 to October 2012. Both the theoretical and experimental results show that in regard to the three wavelengths 355, 532, 1064 nm, the extinction coefficient of cirrus cloud is independent of the wavelengths, and the effective lidar ratio increases as the wavelength increases. The effective lidar ratio of cirrus cloud in Hefei ranges from 10-70 sr, and the mean value of three-wavelength is （21.0±9.3） sr, （29.4±11.7） sr and （38.1± 11.4） sr. The effective lidar ratio of cirrus cloud measured by 355 nm wavelength is the lowest in autumn, while that measured by 532 nm and 1064 nm are the highest in autumn.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2016年第8期262-268,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(41305022
41590870)
国家973计划(2013CB955802)
高原大气与环境四川省重点实验室开放课题(PAEKL-2016-C6)
关键词
大气光学
有效激光雷达比
激光雷达
卷云
消光特性
atmospheric optics
effective lidar ratio
lidar
cirrus cloud
extinction characteristics
