摘要
根据云高仪工作原理,从米散射激光雷达方程出发,推导出一种低层大气中气溶胶消光系数边界值的获取方法,并在此基础上利用Fernald方法反演得到了大气消光系数的垂直分布;通过垂直路径上的消光系数反演得到垂直路径的平均能见度,结果表明,该平均能见度更接近垂直方向真实的能见度。用该算法处理了半导体激光云高仪实际测量的数据,并与Vaisala云高仪测量的垂直能见度进行了对比,结果表明:该算法在反演大气垂直能见度时具有较高的准确性和可靠性。
The paper presents an inversion algorithm for laser diode ceilometer to retrieve the vertical visibility. According to the working principle of laser ceilometer, a method has been derived for determining the boundary value of the aerosol extinction coefficient in the lower troposphere from the elastic scattering lidar equation. Then the vertical distribution of the extinction coeffi- cient can be retrieved by Fernald method, according to which the average visibility can be further retrieved in the vertical direction. The algorithm retrieves the vertical visibility from actual measurement data of ceilometer. The result comparison with Vaisala ceil ometer shows that, the algorithm retrieves the vertical visibility more accurately and reliably.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2012年第2期307-311,共5页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目
公益性行业(气象)科研专项基金资助项目(GYHY200706023)
关键词
大气光学
垂直能见度
迭代算法
半导体激光云高仪
消光系数
atmospheric optics
vertical visibility
iterative algorithm
laser diode ceilometer
extinction coefficient
