The Time-space Distribution Character and Influences of PM_(2.5) in Nanning, Guangxi

摘要

Few study was about the fine particulate matter (PM_(2.5)) in Nanning. This paper analyzed the time-space distribution character and influences of PM_(2.5) in Nanning. We collected data of 4 monitoring stations in 2013 year in Nanning, Guangxi.Our results showed that concentration of PM_(2.5) in 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 PM_(2.5) pollution compared withthe other stations. Concentration of PM_(2.5) was significantly higher in the month when currents came from island than the month when currents from sea. The increased monthly concentration of PM_(2.5) was 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 PM_(2.5) concentration.