Abstract：The paper presents the systematic observational results of a dust case over Guangzhou at 25 Mar 12. The source and tracks of dust aerosol were analyzed by back-trajectory simulation. The results indicate that this pollution case has something to do with long distance transportation of sand dust storm burst out in the west of China. The relative humidity has a significant decrease during the dust case. The ratio of PM2.5 in PM10 is about 28%~31% in monitoring station. This was very different from the typical air pollution characteristics in Guangzhou region where the ambient aerosols are generally dominated by fine particles. This aerosol pollution case was caused by coarse particles. The dust layer that has an influence on the ground was mainly distributed between 1000~2000m.The maximal depolarization ratio of sand dust aerosol is about 0.34 during the dust case.
刘文彬, 刘涛, 黄祖照, 刘叶新, 邝俊侠. 利用偏振-米散射激光雷达研究广州一次浮尘天气过程[J]. 中国环境科学, 2013, 33(10): 1751-1757.
LIU Wen-Bin, LIU Tao, HUANG Zu-Zhao, LIU Ye-Xin, KUANG Jun-Xia. Study of a dust case in Guangzhou using polarization mie-scattering lidar. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(10): 1751-1757.
