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| 題名: | Aerosol chemical profile of near-source biomass burning smoke in sonla, vietnam during 7-SEAS campaigns in 2012 and 2013 |
| 作者: | 林能暉;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 |
| 貢獻者: | 地球科學學院大氣科學學系 |
| 日期: | 2016-11-01 |
| 上傳時間: | 2026-04-21 14:16:30 (UTC+8) |
| 出版者: | AAGR Aerosol and Air Quality Research;Cham: Springer Science and Business Media LLC |
| 摘要: | 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 |
| 顯示於類別: | [大氣科學學系] 期刊論文
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