【摘 要】
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In this study,concentration and size distribution of biogenic secondary organic aerosols (i.e.,isoprene,pinene and sesquiterpene photooxidation products) in the summertime atmosphere of Xian city,Chin
【机 构】
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State Key Laboratory of Loess and Quaternary Geology, Institute of Earth and Environment, Chinese Ac
【出 处】
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第十一届全国气溶胶会议暨第十届海峡两岸气溶胶技术研讨会
论文部分内容阅读
In this study,concentration and size distribution of biogenic secondary organic aerosols (i.e.,isoprene,pinene and sesquiterpene photooxidation products) in the summertime atmosphere of Xian city,China was characterized using a GC/MS technique after a conversion to TMS derivatives.Our results showed that BSOA in Xian are dominated by isoprene oxidation products,which accounted for around 80% of the total quantified BSOA.Biogenic secondary organic carbon derived from isoprene,α-/β-pinene and sesquiterpene were 0.39μg C/m3,0.13μg C/m3,0.10μg C/m3,respectively.Size distributions of the nine determined compounds suggest that BSOA in the city are enriched in fine particles.Compared to that in other cities and mountain areas the relatively lower ratio of MBTCA/CPA ratio of Xian BSOA indicates that BSOA in the city are mostly derived from local sources and more fresh.
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