Near-surface ozone observation at night

During December 15th~18th, 2018, the characteristics of aerosols and ozone observed by lidar located in Wangdu, Hebei Province was analysed. The changes of the boundary layer were judged by the profile of the aerosol extinction coefficient, and then the influence of the atmospheric boundary layer on the ozone concentration in the near surface layer (300m) was studied. The results show that the boundary layer mainly affected the dry deposition of ozone and the vertical transport of high-altitude ozone. When controlled by local pollution, the near-surface ozone concentration was controlled by dry deposition, and decreased with the decrease of the height of the boundary layer. When the airflow from the northwest dominated, the ozone concentration is mainly affected by horizontal transport and high-altitude vertical transport. © 2019, Editorial Board of China Environmental Science. All right reserved.