Establishing a conceptual model for photochemical ozone pollution in subtropical Hong Kong
Establishing a conceptual model for photochemical ozone pollution in subtropical Hong Kong
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DOI：
10.1016/j.atmosenv.2012.09.051
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
Z. Ling;Hai Guo;Junyu Zheng;P. Louie;Hairong Cheng;Fei Jiang;Kalam Cheung;L. C. Wong;
中科院分区：
文献类型：
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作者：
Z. Ling;Hai Guo;Junyu Zheng;P. Louie;Hairong Cheng;Fei Jiang;Kalam Cheung;L. C. Wong;
光化学臭氧（O3）的形成与其前体物质和气象条件有关。在分析香港东涌O3污染数据的基础上，建立了O3空气污染的概念模型。通过比较O3与非O3事件日的气象参数，发现高温、强太阳辐射、低风速和低湿度、东北和西北盛行风有利于O3的形成，而热带气旋最有利于O3事件的发生。臭氧污染的反向轨迹模拟和图解显示，超区域（即中国中部和东部）和区域（即珠江三角洲、华南）的输送是导致香港臭氧水平偏高的另一个因素。在香港，光化学臭氧的形成通常受挥发性有机化合物（VOCs）的限制，受到少量挥发性有机化合物的控制。此外，正矩阵分解（PMF）模拟显示，溶剂使用和车辆排放是香港环境中VOCs的主要来源。最后，本文提出了进一步的O3研究和O3控制策略的实施建议。
Photochemical ozone (O3) formation is related to its precursors and meteorological conditions. A conceptual model of O3air pollution is developed based on the analysis of data obtained at Tung Chung (TC) in Hong Kong. By comparing meteorological parameters between O3and non-O3episode days, it was found that high temperatures, strong solar radiation, low wind speeds and relative humidity, northeasterly and/or northwesterly prevailing winds were favorable for the O3formation, while tropical cyclones were most conducive to the occurrence of O3episodes. Backward trajectories simulation and graphical illustration of O3pollution suggested that super-regional (i.e. central and eastern China) and regional (i.e. Pearl River Delta, southern China) transport was another factor that contributed to high O3levels in Hong Kong. The photochemical O3formation, generally VOC-limited in Hong Kong, was controlled by a small number of volatile organic compounds (VOCs). Furthermore, the positive matrix factorization (PMF) simulation suggested that solvent usage and vehicular emissions are the major contributors to ambient VOCs in Hong Kong. Finally, this paper presents recommendations for further O3research and implementation of O3control strategies.