Particulate matter is the primary pollutant of the urban atmosphere in Beijing. PM10 was 60% higher than the national second-class standard in 2006. Based on fast-response aerosol concentrations and elemental compositions in daily TSP, this study revealed the regionality of episodic aerosol pollution. First, surface weather patterns indicated that episodic aerosol pollution was affected by the passing of cold fronts caused by the synoptic cycles covering large areas, which naturally resulted in the regionality of aerosol pollution in Beijing. Second, as the episodes progressed, PM2.5/PM10 and Pb/Al increased, which was associated with the removal of coarse particles, nucleation of nanoparticles, and formation of secondary particles. Thus aerosol became finer and aged, which implies that the aerosol in Beijing is a result of regional sources.
|Number of pages||6|
|Journal||Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae|
|Publication status||Published - 2009 Mar 1|
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Environmental Science(all)