Analysis of the Characteristics of PM2.5 in Major Urban Agglomerations of China after Action Plan for Preventing and Controlling Air Pollution
Based on satellite remote sensing inversion of ground fine particulate matter dataset,this paper analyzes the temporal trend and spatial distribution of PM25 in the typical urban agglomerations of China after the implementation of Action Plan for Preventing and Controlling Air Pollution.The results show that there are obvious regional differences in the distribution of PM2.5,and the high values of PM25 are mainly concentrated in the southeast of BTH,Jiangsu-Shandong-Henan-Anhui Provinces,Shanxi,Hubei,central and southern parts of Gansu,the east of Hubei,Sichuan Basin,and Taklamakan Desert.From 2000 to 2021,concentration of PM2.5 in China showed an overall decreasing trend,with 2013 as the time node,showing a change trend of first slowly increasing(+0.393)and then rapidly decreasing(-2.830).Compared with four urban agglomerations,the annual average concentration of PM2.5 in BTH was the highest,and the improvement was the most obvious.Concentration of PM2.5 in YRD and CCUA was similar,and the improvement in CCUA was higher than that in YRD.Concentration of PM2.5 in the PRD was the lowest,and there was little difference in the improvement between cities.
Action Plan for Preventing and Controlling Air PollutionPM2.5satellite remote sensingurban agglomerations of China
NETL
NSTL
万方数据
