Aerosol transport from Chiang Mai, Thailand to Mt. Lulin, Taiwan - Implication of aerosol aging during long-range transport

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题名:	Aerosol transport from Chiang Mai, Thailand to Mt. Lulin, Taiwan - Implication of aerosol aging during long-range transport
作者:	林能暉;Chuang, Ming-Tung;Lee, Chung-Te;Chou, Charles C.-K.;Engling, Guenter;Chang, Shih-Yu;Chang, Shuenn-Chin;Sheu, Guey-Rong;Lin, Neng-Huei;Sopajaree, Khajornsak;Chang, You-Jia;Hong, Guo-Jun
贡献者:	地球科學學院大氣科學學系
关键词:	Aerosol anhydrosugars degradation;Aerosol component modification;aerosols;ambient temperature;ammonium compounds;atmospheric chemistry;biomass;Biomass burning smoke;burning;carbon;climate change;dicarboxylic acids;Indochina;inorganic ions;Long-range transport;nitrates;particulates;potassium;Taiwan;Thailand;Water-soluble aerosol components
日期:	2016-07-01
上传时间:	2026-04-21 14:14:42 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： The transport of biomass burning (BB) aerosol from Indochina may cause a potential effect on climate change in Southeast Asia, East Asia, and the Western Pacific. Up to now, the understanding of BB aerosol composition modification during long-range transport (LRT) is still very limited due to the lack of observational data. In this study, atmospheric aerosols were collected at the Suthep/Doi Ang Khang (DAK) mountain sites in Chiang Mai, Thailand and the Lulin Atmospheric Background Station (Mt. Lulin) in central Taiwan from March to April 2010 and from February to April 2013, respectively. During the study period, an upwind and downwind relationship between the Suthep/DAK and Lulin sites (2400 km apart) was validated by backward trajectories. Comprehensive aerosol properties were resolved for PM2.5 water-soluble inorganic ions, carbonaceous content, water-soluble/insoluble organic carbon (WSOC/WIOC), dicarboxylic acids and their salts (DCAS), and anhydrosugars. A Modification Factor (MF) is proposed by employing non-sea-salt potassium ion (nss-K+) or fractionalized elemental carbon evolved at 580 °C after pyrolized OC correction (EC1-OP) as a BB aerosol tracer to evaluate the mass fraction changes of aerosol components from source to receptor regions during LRT. The MF values of nss-SO42−, NH4+, NO3−, OC1 (fractionalized organic carbon evolved from room temperature to 140 °C), OP (pyrolized OC fraction), DCAS, and WSOC were above unity, which indicated that these aerosol components were enhanced during LRT as compared with those in the near-source region. In contrast, the MF values of anhydrosugars ranged from 0.1 to 0.3, indicating anhydrosugars have degraded during LRT. •PM2.5 levels after being transported 2400 km are lowered by a factor of 3.5•The modification of an aerosol component during long-range transport was assessed.•Most water-soluble components are enhanced during long-range transport.•Biomass burning aerosol is more water-soluble in the downwind than source region.•Anhydrosugars were found degraded during long-range transport. 出版者： Elsevier Ltd 出版日期： 2016-07 出處： Atmospheric Environment, 2016-07, Vol.137, p.101-112 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2016 Elsevier Ltd 識別號： ISSN: 1352-2310 識別號： EISSN: 1873-2844 識別號： DOI: 10.1016/j.atmosenv.2016.03.042
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