PM10 and PM2.5 Characterization based on Mass Concentration Long-term (1989 similar to 2012) Database in Yongin-Suwon Area

Fine and coarse PM had been collected by LVCI (low volume cascade impactor) and HVAS (high volume air sampler) during January 1989 to April 2012 at Kyung Hee University, Global Campus located on the boarder of Yongin and Suwon. The database of PM mass concentration was constructed and then intensively and extensively investigated to understand monthly, seasonal, and annual patterns of each PM behavior. Especially the study separated all the PM data into the 5 Period Zones, which were classified on the basis of social, political, and environmental issues that might be influencing local ambient air quality during the monitoring period. The overall PM10 level had been continuously decreased until 2005 and after then was staggering due to rapidly increasing PM2.5 level in PM10. The annual average of PM2.5 concentration varied from 34.3 mu g/m(3) to 59.0 mu g/m(3), which were much higher than the 2015 ambient air quality standard. The PM2.5 level was strongly associated with haze events, while both PM10 and PM2.5 levels were associated with Yellow storm events. Daily concentrations of PM2.5 were ranged 13.1 similar to 212.9 mu g/m(3) in haze days and 33.6 similar to 124.6 mu g/m(3) in Asian dust days. The study also intensively investigated annual and seasonal patterns of PM2.5/PM10 ratios.