Mie散射激光雷达研究成都地区大气边界层结构

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。

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

Basing on Mie scattering laser lidar,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.