Investigation of biomass burning chemical components over Northern Southeast Asia during 7-SEAS/BASELInE 2014 campaign

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题名:	Investigation of biomass burning chemical components over Northern Southeast Asia during 7-SEAS/BASELInE 2014 campaign
作者:	林能暉;Khamkaew, Chanakarn;Chantara, Somporn;Janta, Rungruang;Pani, Shantanu Kumar;Prapamontol, Tippawan;Kawichai, Sawaeng;Wiriya, Wan;Lin, Neng-Huei
贡献者:	地球科學學院大氣科學學系
日期:	2016-11-01
上传时间:	2026-04-21 14:18:38 (UTC+8)
出版者:	AAGR Aerosol and Air Quality Research;Cham: Springer Science and Business Media LLC
摘要:	摘要： This study investigates the chemical components of biomass burning (BB) aerosols obtained from Doi Ang Khang (DAK; near BB source) and Chiang Mai University (CMU; an urban location) over northern Southeast Asia in dry season (March to mid-April) 2014. PM 2.5 (particulate matter with an aerodynamic diameter less than or equal to 2.5 µm) samples were collected over a 24-h sampling period as a part of the Seven South East Asian Studies (7-SEAS)/BASELInE (BB Aerosols & Stratocumulus Environment: Lifecycles & Interactions Experiment) campaign. The collected aerosols were analyzed for mass concentrations of ions, metals and levoglucosan. The influence of air mass movements on aerosol species was also analyzed. The average PM 2.5 mass concentrations at DAK (80.8–83.3 µg m −3 ) and CMU (90.7–93.1 µg m −3 ) were not significantly different ( p > 0.05) and well correlated ( r = 0.8), and likely originated from similar source origins. The number of fire hotspots was particularly high during 20–21 March (greater than 200) and, consequently, peaks of PM 2.5 were recorded at both sites. The most abundant elements at both sampling sites were K (49–50% of total elements), Al (26–31%), Mg (16%) and Zn (4–7%), whereas SO 4 2− (30–38% of total ions), NO 3 − (13–20%), Na + (16–20%) and NH 4 + (14–15%) were the most abundant ions. Concentrations of levoglucosan and K + (BB tracers) were well correlated ( r = 0.5 for CMU and 0.7 for DAK) confirming that the PM 2.5 detected in these areas were mainly influenced by BB activity. Principal component analysis (PCA) revealed that BB, road traffic, agricultural activity and soil re-suspension were plausible sources of PM 2.5 over the study locations. Apart from local sources, the influence of long-range transport was also investigated by way of three-day backward trajectory analysis. 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.2655-2670 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.2016.03.0105
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