Hu Shunxing, Xu Chidong, Ji Yufeng, Hu Huanling
Appl Opt. 2019 Feb 20;58(6):1537-1546. doi: 10.1364/AO.58.001537.
L625 4-wavelength dual Raman-Mie lidar was used to detect elastically Mie backscattered light at emitting wavelengths (532 and 355 nm) emitted by one Nd:YAG laser, and the nitrogen Raman light (607 and 386 nm) inelastically backscattered by nitrogen molecules at Hefei (117.3°E, 31.9°N), China from 2007 to 2013. From the four return signal profiles, highly accurate aerosol extinction and backscatter coefficients, lidar ratio, Ångström exponent, and aerosol Junge exponent can be determined. Furthermore, with a priori assumption of the real part of complex refractive index n=1.50, the profiles of more aerosol microphysical parameters can be retrieved with their respective errors in the free troposphere, such as the imaginary part of the refractive index, Junge number density coefficient, and particle mass index. The profiles of aerosol microphysical parameters were obtained for 179 nights. Their variation and statistical features were discussed.
L625型四波长双拉曼-米氏激光雷达用于探测由一台Nd:YAG激光器发射的发射波长（532和355纳米）处的弹性米氏后向散射光，以及2007年至2013年在中国合肥（东经117.3°，北纬31.9°）由氮分子非弹性后向散射的氮拉曼光（607和386纳米）。从这四个回波信号剖面中，可以确定高精度的气溶胶消光系数和后向散射系数、激光雷达比、Ångström指数和气溶胶容格指数。此外，在先验假设复折射率实部n = 1.50的情况下，可以在自由对流层中反演更多气溶胶微物理参数的剖面及其各自的误差，如折射率虚部、容格数密度系数和颗粒质量指数。获得了179个夜晚的气溶胶微物理参数剖面。讨论了它们的变化和统计特征。
