Investigation of Biomass Burning Chemical Components over Northern Southeast Asia during 7-SEAS/BASELInE 2014 Campaign
| العنوان: | Investigation of Biomass Burning Chemical Components over Northern Southeast Asia during 7-SEAS/BASELInE 2014 Campaign |
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| المؤلفون: | Sawaeng Kawichai, Somporn Chantara, Chanakarn Khamkaew, Rungruang Janta, Tippawan Prapamontol, Shantanu Kumar Pani, Neng Huei Lin, Wan Wiriya |
| المصدر: | Aerosol and Air Quality Research. 16:2655-2670 |
| بيانات النشر: | Taiwan Association for Aerosol Research, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, Meteorology, Levoglucosan, 010501 environmental sciences, Particulates, 01 natural sciences, Pollution, Southeast asia, Aerosol, chemistry.chemical_compound, chemistry, Environmental chemistry, Dry season, Environmental Chemistry, Environmental science, Biomass burning, Chemical composition, Air mass, 0105 earth and related environmental sciences |
| الوصف: | 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. |
| تدمد: | 2071-1409 1680-8584 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9eb2e5e82dfb6c3f511b41210992c18b https://doi.org/10.4209/aaqr.2016.03.0105 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........9eb2e5e82dfb6c3f511b41210992c18b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20711409 16808584 |
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