Air quality assurance and pollution process analysis during major events in 2022
A major event was held in Beijing from October 16th to 22nd,2022.As a city that guarantees air quality,Anyang attaches great importance to ideology and actively responds in action.On October 12th,it launched negotiations on emission reduction measures.However,from October 14th to 16th,Anyang City experienced a round of slight to moderate pollution as adverse meteorological condi-tions combined with regional pollution.This study conducted an in-depth analysis of the current pollution process,and the results showed that particulate matter had the highest proportion in the comprehensive index during this pollution process,with a pollution load ratio of 62.2％,of which PM2.5 accounted for 34.9％.The comparison of ion concentrations before and after the pollution process indicated that the change in secondary components was one of the key factors leading to PM2.5 pollution in this case.The concentration weight trajectory analysis showed that local accumulation was the main source of pollution in this case,while external transmission was affected by the upwind direction towards Hebi City,Xinxiang City,and Handan City.
air quality assuranceanalysis of pollution characteristicsconcentration weight trajectory
万方数据
维普
