The changing characteristics and management of PM2.5 concentration in urban atmospheric environment is an issue of great concern.By analyzing the temporal,spatial and regional change characteristics of urban atmospheric PM2.5 concentration,it is found that PM2.5 concentration has obvious seasonal and daily change characteristics in different time scales,and there is spatial heterogeneity within cities.In addition,there are significant differences in PM2.5 concentrations in different cities and regions,which are affected by a variety of factors,such as industrial emissions,transportation pollution,meteorological conditions,etc.This paper analyzes the main sources of PM2.5 in urban air and proposes countermeasures to improve the quality of urban atmospheric environment and protect the health of residents.
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