Aerosol chemical profile of near-source biomass burning smoke in sonla, vietnam during 7-SEAS campaigns in 2012 and 2013

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Title:	Aerosol chemical profile of near-source biomass burning smoke in sonla, vietnam during 7-SEAS campaigns in 2012 and 2013
Authors:	李崇德;Lee, Chung-Te;Ram, Shidharth Sankar;Nguyen, Dac Loc;Chou, Charles C. K.;Chang, Shih-Yu;Lin, Neng-Huei;Chang, Shuenn-Chin;Hsiao, Ta-Chih;Sheu, Guey-Rong;Ou-Yang, Chang-Feng;Chi, Kai Hsien;Wang, Sheng-Hsiang;Wu, Xue-Chang
Contributors:	環境監測技術聯合中心
Date:	2016-11-01
Issue Date:	2026-04-23 15:03:11 (UTC+8)
Publisher:	AAGR Aerosol and Air Quality Research;Cham: Springer Science and Business Media LLC
Abstract:	摘要： This study aimed to investigate aerosol chemical characteristics and to obtain the chemical profile of near-source biomass burning (BB) aerosols at a site (675 m a.s.l.) in Sonla, Northern Vietnam. Particulate matter (PM) with an aerodynamic diameter less than or equal to 2.5 µm (PM 2.5 ) was collected over a 24 h sampling period as part of the Seven South East Asian Studies (7-SEAS) campaign. The studies were conducted when BB was highly active — that is, in the spring of 2012 and 2013. The collected particles were analyzed for carbonaceous fractions and water-soluble components, in addition to the mass concentration. Data obtained were further analyzed to determine the stable species profile by classifying the 5-day air-mass backward trajectories. The average PM 2.5 mass concentrations were 51 ± 19 µg m −3 and 57 ± 27 µg m −3 in 2012 and 2013, respectively. Carbonaceous contents dominated BB aerosol, with 59% ± 9% and 58% ± 9% in organic carbon (OC) and 9% ± 3% and 10% ± 3% in elemental carbon (EC) of PM 2.5 in 2012 and 2013, respectively. Of the 8 carbonaceous fractions analyzed thermo-optically for PM 2.5 , OC3 (evolution temperature at 280°C–480°C) was most abundant in OC fractions, and EC1-OP (elemental carbon evolved at 580°C minus the pyrolized OC fractions) was predominant in EC fractions in most occasions. Among the measured water-soluble inorganic ions, NH 4 + and SO 4 2− widely varied, indicating the influence of different trajectory origins. This finding was confirmed by trajectory classification of aerosol data. The trajectories were also distinguished with respect to char-EC to soot-EC ratio, and water-soluble OC. These characteristics were highest in the trajectory from the BB source area. 其他題名： Aerosol Air Qual. Res 出版者： Cham: Springer Science and Business Media LLC 出版日期： 2016-11-01 出處： Aerosol and Air Quality Research, 2016-11, Vol.16 (11), p.2603-2617 版權： Taiwan Association for Aerosol Research 2016 識別號： ISSN: 1680-8584 識別號： ISSN: 2071-1409 識別號： EISSN: 2071-1409 識別號： DOI: 10.4209/aaqr.2015.07.0465
Appears in Collections:	[Center for Environmental Monitoring and Technology] journal & Dissertation

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