Characteristics and Cause Analysis of A Heavy Air Pollution Process in Anhui at the End of 2022
Using multi-source data,HYSPLIT4 trajectory analysis and particle matter regional transport analysis,the characteristics and causes of a heavy air pollution process in Anhui at the end of 2022 were ana-lyzed.The results showed that in the early stage of pollution,affected by weak cold air,it was conducive to the transport of pollutants to Anhui.During the pollution period,the ground was in a weak pressure field,the thick-ness of the mixed layer was low and there was a persistent temperature inversion.The ground wind speed was small,the relative humidity was high,and there was basically no precipitation,which was not conducive to the diffusion and removal of pollutants.The pollution level was aggravated due to the common influence of re-gional transport and local pollution emissions accumulation.On January 2,2023,the surface wind direction was mainly northeast and easterly,the wind speed increased,the relative humidity decreased,the thickness of the mixed layer increased,the diffusion conditions were improved and the pollution level was reduced.During this pollution process,the cumulative regional transport contribution rate from Shandong,Jiangsu and Henan to Anhui was 48.5％,which was larger than that from local pollution in Anhui(21.4％).
万方数据
维普
