川渝典型城市夏季气溶胶化学过程特征
Journal: Ecological Environment and Protection DOI: 10.12238/eep.v8i4.2658
Abstract
本研究利用飞行时间气溶胶化学形态监测仪(ToF-ACSM)解析重庆农村夏季PM2.5来源。观测显示非难熔性PM2.5平均浓度为17.72±13.96μg/m3,通过因子分析识别出两类生物质燃烧有机气溶胶(BBOA)和两类二次有机气溶胶(MO/LO-OOA)。当OA浓度升高时,BBOA贡献率显著增加,确证生物质燃烧是推升污染的关键驱动源。区域传输分析表明,生物质排放物在大气传输中氧化转化,促进LO-OOA生成并加剧污染。本研究揭示了四川盆地夏季高温高湿条件下气溶胶的生成机制。
Keywords
生物质燃烧；二次有机气溶胶；PSCF
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