RESEARCH ON THE SPATIAL-TEMPORAL CHARACTERISTICS AND INFLUENCING FACTORS OF PM2.5 IN JIANGXI PROVINCE

At present, the research on PM2.5, the primary pollutant in smog, focuses on macro-scales such as urban agglomerations and economically developed provinces, but less on the financially underdeveloped regions in Mid-Eastern China. The research object of this paper is Jiangxi, an underdeveloped territory in Mid -Eastern China. By collecting PM2.5 concentration data from 2010 to 2015, this paper analyzed the temporal and seasonal variation of PM2.5 and studied spatial-temporal characteristics of PM2.5 by using spatial autocorrelation analysis, using the geographical detector models identified as the main influencing factors of PM2.5 concentration change. The results showed that: (1) the concentration of PM2.5 in Jiangxi province was the highest in winter and the worst pollution, followed by spring and autumn, and the best air quality in summer; (2) the spatial-temporal distribution of PM2.5 is quite different, the heavily polluted northwestern Jiangxi and the better air quality southern Jiangxi show a significant "diagonal" delivery, but the middle zone is not substantial; (3) Natural factors' temperature and socioeconomic factors' GDP are the leading factors that cause the PM2.5 concentration to change, and the interaction between the factors has greatly affected PM2.5 concentration changes.