,Vertical profiles of aerodynamic size distribution for airborne particles over Yangtze River Delta

• 作 者: Wang Wei Bao Lin-Fa Liu Hong-Jie Yue Xin Chen Jian-Hua Li Hong Ren Li-Hong Tang Da-Gang Shiro Hatakeyama Akinori Takami
• 机 构: Chinese Research Academy of Environmental Sciences, Beijing 100012, China“,”National Institute for E
• 出 处: 中国物理（英文版）
• 发表日期: 2007年9期
• 关键词: airborne particles aerodynamic size distribution aircraft observation Yangtse Ri

Based on the aircraft observations in the summer of 2003, we have studied the aerodynamic size distributions of airboe particles at altitudes ranging from 400 m to 2800 m over the central and southe areas of Jiangsu province located in Yangtse River Delta of China. The sizes of airboe particles are measured to be in a range of 0.47-30 μm with 57 channels, and their number concentrations, surface area concentrations and mass concentrations are also measured. The results show that the concentrations of airboe particles are very low above an altitude of 2000 m and the size distributions present a specific multi-peak mode by using insufficient samples. Below 1000 m, however,the concentrations of particles increase obviously, and their size distribution is similar to that at the ground level. The study also indicates that the concentrations, size distributions and median diameters of airboe particles above and below the boundary layer are very different, displaying different pollution features. Meanwhile, the results also show that the pollution level of airboe particles has a descending tendency with altitude increasing.