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DOI | 10.5194/acp-20-5911-2020 |
Hygroscopic properties and cloud condensation nuclei activity of atmospheric aerosols under the influences of Asian continental outflow and new particle formation at a coastal site in eastern Asia | |
Cheung, Hing Cho1,2,3; Chou, Charles Chung-Kuang4; Lee, Celine Siu Lan5; Kuo, Wei-Chen4; Chang, Shuenn-Chin6,7 | |
2020-05-19 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:10页码:5911-5922 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Taiwan |
英文摘要 | The chemical composition of fine particulate matter (PM2.5), the size distribution and number concentration of aerosol particles (N-CN), and the number concentration of cloud condensation nuclei (N-CCN) were measured at the northern tip of Taiwan during an intensive observation experiment from April 2017 to March 2018. The parameters of aerosol hygroscopicity (i.e., activation ratio, activation diameter and kappa of CCN) were retrieved from the measurements. Significant variations were found in the hygroscopicity of aerosols (kappa - kappa - of 0.18-0.56, for water vapor supersaturation - SS - of 0.12 %-0.80 %), which were subject to various pollution sources, including aged air pollutants originating in eastern and northern China and transported by the Asian continental outflows and fresh particles emitted from local sources and distributed by land-sea breeze circulations as well as produced by processes of new particle formation (NPF). Cluster analysis was applied to the back trajectories of air masses to investigate their respective source regions. The results showed that aerosols associated with Asian continental outflows were characterized by lower N-CN and N-CCN values and by higher kappa values of CCN, whereas higher N-CN and N-CCN values with lower kappa values of CCN were observed in the aerosols associated with local air masses. Besides, it was revealed that the kappa value of CCN exhibited a decrease during the early stage of an event of new particle formation, which turned to an increasing trend over the later period. The distinct features in the hygroscopicity of aerosols were found to be consistent with the characteristics in the chemical composition of PM2.5. This study has depicted a clear seasonal characteristic of hygroscopicity and CCN activity under the influence of a complex mixture of pollutants from different regional and/or local pollution sources. Nevertheless, the mixing state and chemical composition of the aerosols critically influence the aerosol hygroscopicity, and further investigations are necessary to elucidate the atmospheric processing involved in the CCN activation in coastal areas. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000537120000001 |
WOS关键词 | SIZE-RESOLVED MEASUREMENTS ; CCN ACTIVITY ; CHEMICAL-COMPOSITION ; NUMBER CONCENTRATION ; SUBMICRON AEROSOLS ; SEASONAL-VARIATION ; RAIN-FOREST ; MEGA-CITY ; GROWTH ; FINE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/267539 |
专题 | 地球科学 |
作者单位 | 1.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou 510275, Peoples R China; 2.Sun Yat Sen Univ, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou 510275, Peoples R China; 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China; 4.Acad Sinica, Res Ctr Environm Changes, Taipei 11529, Taiwan; 5.Chu Hai Coll Higher Educ, Dept Civil Engn, Tuen Mun, Hong Kong, Peoples R China; 6.Environm Protect Adm, Dept Environm Monitoring & Informat Management, Taipei 10042, Taiwan; 7.Natl Def Med Ctr, Sch Publ Hlth, Taipei 11490, Taiwan |
推荐引用方式 GB/T 7714 | Cheung, Hing Cho,Chou, Charles Chung-Kuang,Lee, Celine Siu Lan,et al. Hygroscopic properties and cloud condensation nuclei activity of atmospheric aerosols under the influences of Asian continental outflow and new particle formation at a coastal site in eastern Asia[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(10):5911-5922. |
APA | Cheung, Hing Cho,Chou, Charles Chung-Kuang,Lee, Celine Siu Lan,Kuo, Wei-Chen,&Chang, Shuenn-Chin.(2020).Hygroscopic properties and cloud condensation nuclei activity of atmospheric aerosols under the influences of Asian continental outflow and new particle formation at a coastal site in eastern Asia.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(10),5911-5922. |
MLA | Cheung, Hing Cho,et al."Hygroscopic properties and cloud condensation nuclei activity of atmospheric aerosols under the influences of Asian continental outflow and new particle formation at a coastal site in eastern Asia".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.10(2020):5911-5922. |
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