Temporal and spatial distribution of atmospheric PM1 concentration, composition and source in China
Abstract：Field observations based on aerosol mass spectrometers in Beijing-Tianjin-Hebei region,Yangtze River Delta and Pearl River Delta s were summarized in this study,and the temporal and spatial variation of chemical composition and source of submicron aerosols was discussed.The results show that the average mass concentration of NR-PM1 in the three regions range between 15.3 and 67.9 μg/m3,the highest is in Beijing-Tianjin-Hebei region and the lowest is in Pearl River Delta.Organic aerosol is the major component of NR-PM1 in each region,accounting for 24％～58％.In the Pearl River Delta,the mass fraction of sulfate is significantly higher than that in the other two regions,and that of nitrate is significantly lower.In general,the concentrations of NR-PM1 in autumn and winter are higher than those in spring and summer,mainly due to the increase of organic (BBOA,CCOA) and inorganic (chlorinated) components from combustion emissions.It is also found that HOA and SOA are widespread in all sites of the three regions,while COA is generally found in urban sites.BBOA is widely distributed in Yangtze River Delta and Pearl River Delta,CCOA,however,only existed in Beijing-Tianjin-Hebei region.
Keywords：NR-PM1source appointmenttemporal and spatial distribution
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 1-10 )