Role of photoexcited nitrogen dioxide chemistry on ozone formation and emission control strategy over the Pearl River Delta, China
Role of photoexcited nitrogen dioxide chemistry on ozone formation and emission control strategy over the Pearl River Delta, China
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DOI：
10.1016/j.atmosres.2013.06.001
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发表时间：
2013-10
影响因子：
5.5
通讯作者：
Rui Zhang;G. Sarwar;J. Fung;A. Lau
中科院分区：
文献类型：
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作者：
Rui Zhang;G. Sarwar;J. Fung;A. Lau
中国将一种通过光激发二氧化氮化学生成羟基自由基的新途径加入到纯化学盒子模式和三维空气质量模式中，以研究其在珠江三角洲地区臭氧形成和排放控制策略中的潜在作用。盒子模式的结果表明，在高NOx和VOC浓度下，光激发的二氧化氮化学能显著增强臭氧，而3D空气质量模式的结果显示臭氧只有适度的增加。虽然光激发的二氧化氮化学物质在NOx和VOC浓度丰富的市区上空最多增加了10ppbv的臭氧，但其典型的增强幅度在2ppbv至3ppbv之间。在弱天气风、丰富水汽和强陆海风环流的条件下，它增强了整个行星边界层内的臭氧。没有发现光激发二氧化氮化学对臭氧的模型性能统计有显著的改善。光激发的二氧化氮化学略微改变了臭氧对NOx和VOC排放控制的反应。
A new hydroxyl radical formation pathway via photo-excited nitrogen dioxide chemistry is incorporated into a chemistry-only box model as well as a 3D air quality model to examine its potential role on ozone formation and emission control strategy over the Pearl River Delta region in China. While the box model results suggest that the photo-excited nitrogen dioxide chemistry can substantially enhance ozone at high NOxand VOC concentrations, results of 3D air quality model show only a moderate increase in ozone. Though the photo-excited nitrogen dioxide chemistry enhances ozone by a maximum of 10 ppbV over the urban area in the vicinity of abundant NOxand VOC concentrations, its typical enhancements range between 2 and 3 ppbV. It enhances ozone within the entire planetary boundary layer under conditions featured in weak synoptic wind, abundant water vapor and strong land–sea breeze circulation. No significant improvement in model performance statistics for ozone is found with the photo-excited nitrogen dioxide chemistry. The photo-excited nitrogen dioxide chemistry marginally changes ozone responses to NOxand VOC emission controls.