Vertical profiles of aerodynamic size distribution for airborne particles over Yangtze River Delta
Vertical profiles of aerodynamic size distribution for airborne particles over Yangtze River Delta
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DOI：
10.1088/1009-1963/16/9/054
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发表时间：
2007-09
期刊：
影响因子：
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通讯作者：
Wang Wei;Lin-Fa Bao;Hong-Jie Liu;Yue Xin;Jian-Hua Chen;Li Hong;Li-Hong Ren;Da-Gang Tang;S. Hatakeyama;A. Takami
中科院分区：
文献类型：
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作者：
Wang Wei;Lin-Fa Bao;Hong-Jie Liu;Yue Xin;Jian-Hua Chen;Li Hong;Li-Hong Ren;Da-Gang Tang;S. Hatakeyama;A. Takami
根据2003年夏季的飞机观测数据，研究了位于长江三角洲的江苏省中南部地区400 ~ 2800 m高度范围内空气颗粒物的空气动力学粒径分布。用57个通道测量了0.47 ~ 30 μm的气载颗粒物，并测量了它们的数浓度、表面积浓度和质量浓度。结果表明，在2000 m以上，大气颗粒物浓度很低，在采样不足的情况下，颗粒物粒径分布呈现出特定的多峰模式。而在1000 m以下，颗粒物浓度明显增加，粒径分布与地面相似。研究还表明，边界层上、下的悬浮颗粒物浓度、粒径分布和中值粒径有很大差异，表现出不同的污染特征。研究结果还表明，随着海拔高度的增加，大气颗粒物的污染水平有下降的趋势。
Based on the aircraft observations in the summer of 2003, we have studied the aerodynamic size distributions of airborne particles at altitudes ranging from 400 m to 2800 m over the central and southern areas of Jiangsu province located in Yangtse River Delta of China. The sizes of airborne 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 airborne 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 airborne particles above and below the boundary layer are very different, displaying different pollution features. Meanwhile, the results also show that the pollution level of airborne particles has a descending tendency with altitude increasing.