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气溶胶后向散射消光对数比对消光系数反演的影响研究
引用本文:王治华,贺应红,李振声,左浩毅,何捷,郑玉臣,杨经国.气溶胶后向散射消光对数比对消光系数反演的影响研究[J].量子电子学报,2006,23(3):335-340.
作者姓名:王治华  贺应红  李振声  左浩毅  何捷  郑玉臣  杨经国
作者单位:1. 四川大学物理系,四川,成都,610064
2. 香港城市大学物理及材料科学系,香港
摘    要:使用Mie散射激光雷达在阴、雾和晴三种天气状况下采集了大气回波信号,从所测数据反演气溶胶消光系数的过程中发现,气溶胶后向散射消光对数比对反演结果存在较大影响.在阴天天气下,当后向散射消光对数比从0.7变化到1.0时,气溶胶消光系数反演结果相差近5倍;对晴天天气,反演结果相差近3倍;而在有雾天气,其反演结果变化不大.通过参考大气能见度因子对消光系数进行修正,并从而获得对应的后向散射消光对数比,给出了一种根据天气状况确定气溶胶后向散射消光对数比的新方法.实际反演计算表明,用此方法可获得与实际更为接近的气溶胶消光系数.

关 键 词:大气光学  激光雷达  气溶胶消光系数  后向散射消光对数比  大气能见度
文章编号:1007-5461(2006)03-0335-06
收稿时间:2005-03-04
修稿时间:2005-04-27

Effects of backscatter extinction logarithmic ratio on the inversion of aerosol extinction coefficiency
WANG Zhi-hua,HE Ying-hong,LI Zhen-sheng,ZUO Hao-yi,HE Jie,Andrew Yuk Sun Cheng,YANG Jing-guo.Effects of backscatter extinction logarithmic ratio on the inversion of aerosol extinction coefficiency[J].Chinese Journal of Quantum Electronics,2006,23(3):335-340.
Authors:WANG Zhi-hua  HE Ying-hong  LI Zhen-sheng  ZUO Hao-yi  HE Jie  Andrew Yuk Sun Cheng  YANG Jing-guo
Abstract:By using Mie scattering lidar, return signals in cloudy, foggy and sunny weather are measured. In the process of inversion, selection of the logarithmic ratio of aerosol backscatter- to-extinction has a large effect on extinction coefficient. For cloudy weather, when the logarithmic ratio of aerosol backscatter-to-extinction changes from 0.7 to 1.0, the change of aerosol extinction coefficient is 5 times, for sunny weather, the change is near 3 times, whereas for foggy weather, the change is not much. Using visibility data obtained by meteorological observation, corresponding logarithmic ratio of aerosol backscatter-to-extinction is obtained. A new type of method for deciding logarithmic ratio of aerosol backscatter-to-extinction based on weather conditions is proposed. The corrected results are close to the real atmospheric conditions.
Keywords:atmospheric optics  lidar  aerosol extinction coefficient  logarithmic ratio of aerosol backscatter-to-extinction  atmospheric visibility
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