Characteristics and Influence Factors of Urban Dust-Fall Pollution in Henan Province from 2019 to 2021
Based on the monitoring data of urban atmospheric dust in Henan Province from 2019 to 2021,this paper analyzes the changes in urban atmospheric dust pollution,and uses trend analysis and correlation coefficient method to identify the main factors affecting urban atmospheric dust in Henan Province.The results showed that during the study period,the annual increase in urban atmospheric dust precipitation in the province was 21％,and 78％of cities showed an upward trend.The high values of urban atmospheric dust fall mainly occurred from March to June,when there were mostly sandy and dusty days with little rain and a lot of strong winds.The high value of urban atmospheric dust in 2021 also occurred during the period of heavy rainfall from July to September.The increase in urban atmospheric dust deposition was influenced by both natural and human factors.On the one hand,the scouring effect of heavy rainfall resulted in higher urban atmospheric dust deposition from July to September 2021 compared to the same period in history.On the other hand,the problem of dust pollution was still prominent in Henan Province,and the ratio of PM10 concentration to PM2.5 concentration in 2021 increased by 8％compared to 2019.Therefore,improving the level of urban dust management is one of the important ways to reduce urban atmospheric dust-fall.
NETL
NSTL
万方数据
