Novel Method Based Upon Combined Lidar System for PM2.5 Detection

In this paper, we proposed a novel method based upon Lidar, atmospheric transmissometer and particle size spectrometer for PM2.5 detection. Combining the transmissive visibility meter and a particle size spectrometer, we can establish the relationship between PM2.5 mass concentration and atmospheric transmittance in vertical space. Then, with the transmissive visibility meter and Lidar, the vertical distribution of the atmospheric transmittance detected by the Lidar can be corrected. Compared with the direct use of particle size spectrometer and Lidar to retrieve the PM2.5 mass concentration profile, our method not only can determine Lidar boundary value effectively, but also settle the issue of incomplete overlap zone between the transmitter and the receiver to a certain extent. With real data, the proposed method is verified.