Atmospheric observations of new particle growth and shrinkage

Li Hao Young, Shan Hu Lee, Vijay P. Kanawade, Ta Chih Hsiao, Yungling L. Lee, Bing Fang Hwang, Yi Jyun Liou, Hui Tsung Hsu, Perng Jy Tsai

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)


In subtropical central Taiwan, a total of fourteen new particle formation (NPF) events were identified at four sites that represent urban, coastal, mountain and downwind area, respectively. Among them, there were five particle shrinkage events showing the grown particles shrank back to the smallest measureable size of ∼10 nm, thereby creating a unique "arch-like" shape in the size distribution contour plot. The particle shrinkage rates ranged from 5.1 to 7.6 nm h-1. The corresponding particle volume losses suggest that a notable fraction of the condensable species that contributed to growth was semi-volatile. The particle shrinkage was related to strong atmospheric dilution, high ambient temperature and low relative humidity, thus favoring the evaporation of semi-volatile species from the particulate phase to the gas phase. Our observations show that the new particle growth could be a reversible process, in which the evaporating semi-volatile species are important for the growth of new particles to sizes of environmental health concerns.

主出版物標題Nucleation and Atmospheric Aerosols - 19th International Conference
出版狀態Published - 2013
事件19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013 - Fort Collins, CO, United States
持續時間: 2013 六月 232013 六月 28


名字AIP Conference Proceedings


Other19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013
國家/地區United States
城市Fort Collins, CO

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)


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