Vertical Profiles of Volatile Organic Compounds in Suburban Shanghai
Vertical Profiles of Volatile Organic Compounds in Suburban Shanghai
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DOI：
10.1007/s00376-021-0126-y
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发表时间：
2021-06
影响因子：
5.8
通讯作者：
Yuhan Liu;Hongli Wang;Sheng’ao Jing;Ming Zhou;Shenrong Lou;Kun Qu;Wan Qiu;Qian Wang;Shule Li;Yaqin Gao;Yusi Liu;Xiao-bing Li;Z. Peng;Junhui Chen;K. Lu
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文献类型：
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作者：
Yuhan Liu;Hongli Wang;Sheng’ao Jing;Ming Zhou;Shenrong Lou;Kun Qu;Wan Qiu;Qian Wang;Shule Li;Yaqin Gao;Yusi Liu;Xiao-bing Li;Z. Peng;Junhui Chen;K. Lu
挥发性有机化合物（VOCs）是臭氧的前体物之一，其分布和浓度变化与当地的臭氧污染控制密切相关。本研究于2016年9月8日和9月9日在上海金山区获得了VOCs的垂直廓线，以研究其分布及其对近地层局部大气氧化的影响。使用无人驾驶飞行器，用summa收集罐从50米至400米的高度收集垂直样品。挥发性有机化合物（VOCs是指本研究中测量的52种物质）的浓度在200 m以下变化最小，从100 m到400 m下降了21.2%。200 m以上的VOCs浓度明显低于200 m以下。烷烃和芳烃的比例分别从55.2%和30.5%增加到57.3%和33.0%。此外，烯烃的比例从13.2%下降到8.4%。甲苯和间/对二甲苯是形成SOA和臭氧的关键物质。主成分分析（PCA）显示，在这项研究中测量的VOCs主要来自工业排放。
As Volatile Organic Compounds (VOCs) are one of the precursors of ozone, their distribution and variable concentrations are highly related to local ozone pollution control. In this study, we obtained vertical profiles of VOCs in Shanghai’s Jinshan district on 8 September and 9 September in 2016 to investigate their distribution and impact on local atmospheric oxidation in the near surface layer. Vertical samples were collected from heights between 50 m and 400 m by summa canisters using an unmanned aerial vehicle (UAV). Concentrations of VOCs (VOCs refers to the 52 species measured in this study) varied minimally below 200 m, and decreased by 21.2% from 100 m to 400 m. The concentrations of VOCs above 200 m decreased significantly in comparison to those below 200 m. The proportions of alkanes and aromatics increased from 55.2% and 30.5% to 57.3% and 33.0%, respectively. Additionally, the proportion of alkenes decreased from 13.2% to 8.4%. Toluene andm/p-xylene were the key species in the formation of SOA and ozone. Principal component analysis (PCA) revealed that the VOCs measured in this study mainly originated from industrial emissions.