Demonstration of Aerosol Property Profiling by Multiwavelength Lidar under Varying Relative Humidity Conditions

• DOI: 10.1175/2009jtecha1254.1
• Publication Date: 2009-03-13T20:47:03Z
• Authors: I. Veselovskii; D. N. Whiteman; A. Kolgotin; E. Andrews; M. Korenskii
• Keywords: Angstrom exponent; Sun photometer; AERONET; Photometer; Molar absorptivity

Abstract The feasibility of using a multiwavelength Mie–Raman lidar based on tripled Nd:YAG laser for profiling aerosol physical parameters in the planetary boundary layer (PBL) under varying conditions relative humidity (RH) is studied. quantifies three backscattering and two extinction coefficients from these optical data particle such as concentration, size, complex refractive index are retrieved through inversion with regularization. column-integrated, lidar-derived compared results AERONET sun photometer. photometer agree well characterization fine-mode parameters, however shows less sensitivity to coarse mode. reveal strong dependence properties RH. height regions enhanced RH characterized by an increase coefficient decrease Ångström exponent coinciding size. hygroscopic growth factor calculated select case consistent previous literature despite lack collocated radiosonde data. These demonstrate potential Raman technique study humidification process.