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Growth Rates of Fine Aerosol Particles at a Site near Beijing in June 2013

查看全文 作　　者：Chuanfeng [1,2]ZHAO;Yanan [1]LI;Fang [1]ZHANG;Yele [3]SUN;Pucai [3]WANG 高影响力作者 机构地区：[1]State Key Laboratory of Earth Surface Processes and Resource Ecology, and College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China;[2]Joint Center for Global Change Studies, Beijing 100875, China;[3]Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100875, China高影响力机构 出　　处：《Advances in Atmospheric Sciences》索引2018年第35卷第2期,共9页高影响力期刊 基　　金：supported by the Ministry of Science and Technology of China (Grant No. 2017YFC1501403);the National Natural Science Foundation of China (Grant No. 41575143);the China “1000 Plan” Young Scholar Program;the State Key Laboratory of Earth Surface Processes and Resource Ecology,and the Fundamental Research Funds for the Central Universities;supported by the Ministry of Science and Technology of China 摘　　要：Growth of fine aerosol particles is investigated during the Aerosol–CCN–Cloud Closure Experiment campaign in June2013 at an urban site near Beijing. Analyses show a high frequency(~ 50%) of fine aerosol particle growth events, and show that the growth rates range from 2.1 to 6.5 nm h^(-1) with a mean value of ~ 5.1 nm h^(-1). A review of previous studies indicates that at least four mechanisms can affect the growth of fine aerosol particles: vapor condensation, intramodal coagulation,extramodal coagulation, and multi-phase chemical reaction. At the initial stage of fine aerosol particle growth, condensational growth usually plays a major role and coagulation efficiency generally increases with particle sizes. An overview of previous studies shows higher growth rates over megacity, urban and boreal forest regions than over rural and oceanic regions. This is most likely due to the higher condensational vapor, which can cause strong condensational growth of fine aerosol particles.Associated with these multiple factors of influence, there are large uncertainties for the aerosol particle growth rates, even at the same location. 关 键 词：生长率 好喷雾器粒子 Xianghe
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