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Research on Elemental Concentrations and Distributions of Aerosols in Winter/ Spring in Beijing

Zhang Renjian, Wang Mingxing, Zhang Wen, Wang Yuesi and Li Aiguo (State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029) Zhu Guanghua (Instit  
In 1999, aerosol samples were collected by cascade at the meteorological tower at the altitude of 47 m (February 23~28) and at the top of a two-level office building nearby at the altitude of 6 m (March 10~12) in Beijing The 12 group aerosols samples obtained were analyzed using PIXE method, which resulted in 20 elemental concentrations and elemental distribution From the observation, the elemental concentrations, elemental distribution and their changes are analyzed It has been found that concentrations of most elements of aerosols increase much compared with that in the past except that the concentrations of V, K Sr decrease It shows that the source of aerosols in Beijing has changed much in the past decade
【Fund】: 中国科学院大气物理研究所所长重点基金项目!98-2 0 9;; 国家重点基础研究发展规划项目!G1 9990 4 3 4 0 3;;