Observation and Inversion of Aerosol Particle Size Distribution over Yinchuan Area

Particle size distribution is one of the important microphysical parameters to characterize aerosol properties. The optical depth used as function wavelength study particle whole atmospheric column. However, inversion equation from belongs Fredholm integral first kind, which usually ill-conditioned. To overcome this drawback, discretized directly by using complex trapezoid formula. Then, corresponding are selected L curve method. Finally truncated singular value decomposition regularization method employed regularize discrete and retrieve distribution. verify feasibility algorithm, depths taken a sun photometer CE318 over Yinchuan area in four seasons, well hazy, sunny, floating dusty blowing days, were In order effect Tikhonov algorithm was also adopted PSD. By comparing errors two regularizations, has better retrieval effect. Moreover, understand intuitively sources particles, backward trajectory track source. experiment results show that an effective depth.