Aerosol chemical properties and related pollutants measured in Dongsha Island in the northern South China Sea during 7-SEAS/Dongsha Experiment

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题名:	Aerosol chemical properties and related pollutants measured in Dongsha Island in the northern South China Sea during 7-SEAS/Dongsha Experiment
作者:	王家麟;Chuang, Ming-Tung;Chang, Shuenn-Chin;Lin, Neng-Huei;Wang, Jia-Lin;Sheu, Guey-Rong;Chang, You-Jia;Lee, Chung-Te
贡献者:	理學院化學學系
关键词:	7-SEAS;Aerosol chemical properties;aerosols;anthropogenic activities;atmospheric chemistry;biomass;burning;China;chlorides;coal;combustion;Dongsha Island;ions;Philippines;physicochemical properties;pollutants;sodium;South China Sea;Taiwan;United States
日期:	2013-10-01
上传时间:	2026-04-21 14:12:56 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： Aerosol observations were conducted at Dongsha Island in two batches from 19 to 23 March and 10 to 19 April 2010. Dongsha Island is located in a remote area over the northern South China Sea (SCS), distantly surrounded by southern China, Taiwan, the Philippines, and the Indochinese Peninsula. During the study period, the average PM10 and PM2.5 mass concentrations were 26.5 ± 19.4 and 12.6 ± 6.0 μg m−3, respectively. In particular, a daily PM10 concentration of 94.1 μg m−3 caused by a yellow-dust event originating from the Asian Continent was recorded on 21 March. Other than this event, the PM2.5 and PM10–2.5 daily levels were 7.1 ± 1.2 and 12.6 ± 5.0 μg m−3, respectively, on days without pollution from anthropogenic sources in the surrounding areas. Water-soluble ions (WSIs) were the predominant components that accounted for 58.7% ± 10.5% and 51.1% ± 7.2% of the PM10 and PM2.5 mass. The second most abundant component was carbonaceous content, which accounted for 9.5% ± 4.7% and 17.5% ± 5.3% of PM10 and PM2.5, respectively. SO42− was the most abundant PM2.5 WSI, whereas the Na+ and Cl− pair was the most abundant PM10–2.5 WSI. Based on the U.S. IMPROVE protocol, the resolved carbonaceous fractions were mainly distributed in PM2.5 and influenced by coal combustion, mobile vehicles, and biomass burning. Most of the resolved WSIs in particles were in the liquid phase due to the humid environment around the northern SCS. ► This study provides aerosol information in the northern South China Sea. ► The yellow-dust transport from the Asian Continent was observed. ► Ground PM2.5 level was about 7 μg m−3 in the pristine West Pacific. 出版者： Elsevier Ltd 出版日期： 2013-10 出處： Atmospheric environment (1994), 2013-10, Vol.78, p.82-92 資源來源： ScienceDirect 版權： 2012 Elsevier Ltd 識別號： ISSN: 1352-2310 識別號： EISSN: 1873-2844 識別號： DOI: 10.1016/j.atmosenv.2012.05.014
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