Abstract:At the end of April 2009, a serious air pollution episode caused by long range transport of coarse particle aerosol occurred in Southern China. This episode was characterized by the excessive aerosol mass concentration without obvious visibility degradation. This paper investigates the underlying reasons for this typical air pollution episode in southern china. We found that there were three times of significant decrease of PM2.5-to-PM10 ratio, with the lowest value of 0.3. This was very different from the typical air pollution characteristics in the Pearl River Delta (PRD) region where the ambient aerosols are generally dominated by fine particles. This clearly reflected the intrusion of coarse particles from outside PRD. We concluded that the floating dust particles, which may age at the Yangtze River Delta and then transport to the PRD, together with the local pollutants, were responsible for this severe air pollution episode.
吴兑, 吴晟, 李菲, 陈欢欢. 粗粒子气溶胶远距离输送造成华南严重空气污染的分析[J]. 中国环境科学, 2011, 31(4): 540-545.
WU Dui, WU Sheng, LI Fei, CHEN Huan-Huan. Air pollution episode in southern China due to the long range transport of coarse particle aerosol. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(4): 540-545.