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| 題名: | Comprehensive PM2.5 organic molecular composition and stable carbon isotope ratios at Sonla, Vietnam: Fingerprint of biomass burning components |
| 作者: | 林能暉;Nguyen, Dac Loc;Kawamura, Kimitaka;Ono, Kaori;Ram, Shidharth Sankar;Engling, Guenter;Lee, Chung-Te;Lin, Neng-Huei;Chang, Shuenn-Chin;Chuang, Ming-Tung;Hsiao, Ta-Chih;Sheu, Guey-Rong;Yang, Chang-Feng Ou;Chi, Kai Hsien;Sun, Shao-An |
| 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 14:17:11 (UTC+8) |
| 出版者: | AAGR Aerosol and Air Quality Research;Cham: Springer Science and Business Media LLC |
| 摘要: | 摘要： This study presents measurements of aerosol chemical properties at Sonla, northern Vietnam (675 m a.s.l.) during spring time, when biomass burning (BB) was very active in the northern Indochina Peninsula, as part of the 7-SEAS (Seven South East Asian Studies) campaign in 2013. The gas chromatography-mass spectrometry (GC-MS) analysis of BB markers in 14 selected samples indicated that mixed softwood, hardwood, grass, and non-woody vegetation were burned. More than 50 organic compounds including levoglucosan, lignin and resin products, sugar and sugar alcohol compounds, fatty acids, phthalate esters, aromatic acids, poly-acids, and biogenic oxidation products (e.g., 2-methyltetrols, alkene triols, 3-hydroxyglutaric acid) were measured in PM_(2.5). Levoglucosan, a BB tracer, was the predominant species among aerosol sugars, with an average concentration of 1.62 ± 0.89 μg m^(-3), comprising 2.23 ± 0.5% of PM_(2.5) mass. For the collection period of the selected samples, backward air mass trajectories were classified into the source regions of Indochina (BBIC), southern China (BBSC), and the South China Sea (BBSS). All resolved molecular compounds show their dominance on the trajectory from BBIC, verifying the BB smoke origin of that region. Trajectory classification provides additional information, such as higher level of diethyl phthalate associated with BBSC trajectory, revealing urban or industrial influence, and more low-molecular-weight than high-molecular-weight fatty acids, indicating distributions with more microbial and lesser plant wax/vegetation burning contributions along the BBSC trajectory. In addition, we report, for the first time, stable carbon isotopic data (δ^(13)C) for PM_(2.5) aerosols in northern Vietnam, which ranged from -26.6 to -25.4 per mille in PM_(2.5), indicating contributions from burning of C_3 plants and fossil fuel combustion.
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.2618-2634
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.2015.07.0459 |
| 顯示於類別: | [大氣科學學系] 期刊論文
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