Mie散射激光雷达研究成都地区大气边界层结构  

Study on the characteristics of atmospheric boundary layer by Mie scattering lidar over Chengdu

作　　者：王治华[1] 王宏波[1] 何捷[1] 郑玉臣[1] 杨经国[1] 李跃清[2] 赵兴炳[2] 

机构地区：[1]四川大学物理系 [2]中国气象局成都高原气象研究所,成都610071

出　　处：《激光杂志》2008年第2期36-38,共3页Laser Journal

基　　金：国家自然科学基金资助项目60078020和60478044

摘　　要：基于Mie散射大气激光雷达,对成都地区大气边界层结构随时间变化的特性进行了研究。首先,应用Klett算法对大气激光雷达回波信号进行了反演,得到大气消光系数和后向散射系数。然后,通过对大气后向散射系数曲线进行拟合得到大气边界层混合层高度以及卷夹层厚度等特征参量。基于实测数据对成都地区大气回波信号进行了反演,结果表明,成都地区大气边界层混合层高度较低,卷夹层厚度较薄,且随时间变化的趋势较缓慢,这与成都地区特殊的地理状况有关。Basing on Mie scattering laser hdar, the change of the structure of atmospheric boundary layer in Chengdu was discussed. First, aerosol extinction coefficient and backscatter coefficient were inverted by using Lidar returns and Klett inversion method. Then, the characteristic parameters of atmospheric mixed layer height and entrainment zone width of the atmospheric boundary layer were obtained by fitting inverted backscatter coefficient curve. Last, the lidar returns of Chengdu were inverted basing on the detected data. The result is that mixed layer height is lower, entrainment zone width is thinner in Chengdu than in other areas, and the characteristics of the atmospheric boundary layer changed slightly with time in Chengdu. This is relevant to the special position of Chengdu.

关 键 词：大气光学 MIE散射 大气激光雷达 大气边界层 大气后向散射系数 

分 类 号：O433[机械工程—光学工程]