Cause Analysis of A Summer Ozone Pollution Process in Guangzhou in 2022
In order to explore the causes of summer ozone(O3)pollution in Guangzhou under the background of continuous emission reduction,the first ozone pollution process in the summer of 2022 was selected to study.Based on the observation data of ozone and its precursors and meteorological data,the characteristics of the pollution process and the influence of transmission on O3 were comprehensively analyzed from the aspects of meteorological conditions,regional transmission and emission of ozone precursors.The results show that under the control of subtropical high,low humidity and high temperature are conducive to ozone generation,low wind hours,poor pollution diffusion conditions,and longer sunshine hours,which are conducive to photochemical reaction.The dominant wind direction of the pollution day was south wind,and the current round of pollution process advanced from south to north,and the hourly variation of ozone appeared a double-peak trailing peak phenomenon,which had certain regional pollution and transmission effects.The night before the pollution and the early morning of the same day,the concentration of NO2 and volatile organic compounds were high,providing sufficient conditions for ozone generation.
万方数据
维普
