Department of Environmental Engineering, School of Resources and Environmental Sciences, Wuhan University, China.
Environ Pollut. 2013 Sep;180:101-10. doi: 10.1016/j.envpol.2013.04.039. Epub 2013 Jun 5.
In this study, tropical cyclones over the East and South China Seas were found to be the most predominant weather conditions associated with the occurrence of high ozone (O3) episodes in Hong Kong in 2005-2009. A photochemical trajectory model coupled with Master Chemical Mechanism (MCM) was adapted to simulate the O3 concentrations during two O3 pollution episodes. The results agreed well with the observed data. A representative backward air mass trajectory was used to determine the contribution of each volatile organic compound (VOC) to the O3 levels. After taking into account both reactivity and mass emission of each VOC, 10 species were found to be the key O3 precursors in Hong Kong. Further analysis identified solvent related products accounting for 70% of the modeled O3 concentration in Hong Kong. The results highlight the importance of considering together reactivity and source sector emissions in developing targeted VOC reduction for O3 abatement strategies.
在这项研究中，研究人员发现，2005 年至 2009 年期间，香港发生高臭氧（O3）事件与东海和南海的热带气旋是最主要的相关天气条件。研究人员采用一种光化学轨迹模型结合主化学机制（MCM）来模拟两次 O3 污染事件期间的 O3 浓度。结果与观测数据吻合较好。研究人员还使用代表性的后向空气轨迹来确定每个挥发性有机化合物（VOC）对 O3 水平的贡献。在考虑了每个 VOC 的反应性和质量排放后，研究人员发现有 10 种物质是香港的关键 O3 前体。进一步的分析确定，溶剂相关产品占香港模拟 O3 浓度的 70%。研究结果强调，在制定针对 O3 减排的 VOC 减排策略时，必须同时考虑反应性和源排放部门的重要性。
