Accuracy Remote-Sensing of Aerosol Spatial Distribution within the Atmospheric Boundary Layer by Twin Scanning Lidars

摘要

Aerosols within the atmospheric boundary layer (ABL) play an important role in the absorption and scattering of atmospheric radiation, the forming of precipitation and the circulation of chemistry. Due to the influence of solar heating at the surface, which causes thermal plumes to rise, transporting moisture, heat and particulates into the ABL, the aerosol distribution is inhomogeneous and variation with time. Lidar is proven to be a powerful tool in the application of remote sensing of atmospheric properties (Klett 1981). However, the existing of overlap function in lidar equation limits the fine detection of aerosol optical properties in the lower troposphere by vertical measurement, either by Raman lidar (Whiteman 2003) or by high spectral resolution lidar (Imaki 2005). Although the multi-angle method can succeed the aerosol measurement from the ground, the homogeneous atmospheric is needed (Pahlow 2004). The spatial distribution of aerosol within the ABL is still difficult to detect accurately.