The Time-Space Distribution Character and Influences of PM_2.5 in Nanning, Guangxi

Abstract

Few study was about the fine particulate matter (PM2.5) in Nanning. This paper analyzed the time-space distribution character and influences of PM2.5in Nanning. We collected data of 4 monitoring stations in 2013 year in Nanning, Guangxi. Our results showed that concentration of PM2.5in Nanning were Dec. > Jan > Oct. > Nov. > Mar. > Apr. = Sep. > Feb. > May = Aug. > June > July. The obvious hazy day occurred in winter and autumn. The monitoring stations located in the north suffered higher PM2.5pollution compared with the other stations. Concentration of PM2.5was significantly higher in the month when currents came from island than the month when currents from sea. The increased monthly concentration of PM2.5was associated with the northwest and northeast currents from inland. A combination of lower speed of wind, northwestly wind and regional transport made contribution to the evaluated PM2.5concentration.