Journal of Atmospheric and Environmental Optics ›› 2016, Vol. 11 ›› Issue (2): 81-90.

• 论文 •     Next Articles

Study of the Process of Aerosol Particle Formation by Ion-Induced Nucleation

WEN Zuoying1,2,3, GU Xuejun1,3, RONG Hua1,3,4, ZHU Yupeng1,3, TANG Xiaofeng1,3, GAI Yanbo1,3, HU Changjin1,3, ZHAO Weixiong1,3, ZHANG Weijun1,3,4   

  1. (1 Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, Anhui, China; 
    2 Graduate School, University of Science and Technology of China, Hefei, 230026, Anhui, China; 
    3 Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, Anhui, China; 
    4 School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei, 230026, Anhui, China )
  • Received:2015-12-21 Revised:2015-12-31 Online:2016-03-28 Published:2016-03-18
  • Contact: 温作赢(1991-),男,浙江温州人,研究生,主要从事气溶胶成核研究。 E-mail:zywen@mail.ustc.edu.cn

Abstract:

Ion-induced nucleation is one of the most significant pathway of aerosol particle formation in the atmosphere. Air molecules are radiated by the cosmic ray to generate a mass of initial primary ions which will quickly react with common trace air constituents such as H2O, H2SO4, HNO3, NH3 and organic species to form more stable ions, called as cluster ions. Processes for aerosol formation are the competition between growth and evaporation. When the critical nucleus forms, the formed small aerosol particle growth become spontaneous. This critical diameter can be calculated and predicted to be about 1.6 nm with mass number more than 5000 amu at standard atmospheric condition. However, there exist many controversies on ion-induced nucleation to what extent of influencing global climate and new particle nucleation. More observations, molding and laboratory studies should be carried out to explore the mechanism of ion-induced nucleation clearly.

Key words: ion-induced nucleation, aerosol, cluster ions, critical nucleus, cosmic ray, climate

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