Comprehensive Analysis of a Dust Storm by a Lidar Network Combined With Multiple Data

In order to improve the accuracy of dust storm prediction and reduce damage losses by a event, it is necessary conduct an in-depth study on same. The data national air quality stations, backward trajectories generated Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT), lidar network from Wuwei, Baiyin, Dingxi were used large-scale event that occurred 12 14 May 2019. This explores cause physical characteristics aerosols in three-dimensional space, as well its impact quality. Results show was caused eastward movement East Asian trough affected most cities northern China northwest southeast. Consequently, deteriorated seriously, especially over Hexi Corridor. hourly peak concentrations PM 10 Wuwei Baiyin close 3,000 μg·m −3 . observations intensities similar at different cities, their extinction coefficients close. However, depolarization ratio varied with sources particles. According simulation results particle concentrations, due transported high altitudes, concentration particles did not decrease increase altitude. ground-based monitoring lower than those while above 0.3 km higher Wuwei.