Sources of nitrogen dioxide in winter smog episodes
Sources of nitrogen dioxide in winter smog episodes
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冬季雾霾中二氧化氮的来源
DOI：
10.1016/0048-9697(96)05236-9
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发表时间：
1996
影响因子：
9.8
通讯作者：
Ji Ping Shi
中科院分区：
文献类型：
--
作者：
R. Harrison;Ji Ping Shi
在英国的冬季，在城市空气中观察到了高度升高的二氧化氮浓度，并且不能用目前的排放和大气化学知识来解释，因为NO的形成被认为受到大气臭氧可用性的限制。在公路隧道中的NO2 NOx比的测量，并在风洞中，废气被引入显示的比例小于10%，和主要的排放和/或快速氧化的废气羽流不能完全解释城市空气中的NO2浓度升高。在实验室反应器中的研究表明，NO + O2反应的速率可以提高在其他车辆尾气成分的存在下，在一定程度上，这可能占二氧化氮的偶发性峰值浓度。
Highly elevated concentrations of nitrogen dioxide have been observed in urban air in winter episodes in the UK, and cannot readily be explained by current knowledge of emissions and atmospheric chemistry, since formation from NO is thought to be limited by the availability of atmospheric ozone. Measurements of NO2NOxratios in a road tunnel, and in a wind tunnel into which exhaust gases are introduced show ratios of less than 10%, and primary emissions and/or rapid oxidation of exhaust gas plumes cannot wholly explain elevated concentrations of NO2in urban air. Studies in a laboratory reactor reveal that the rate of the NO + O2reaction can be enhanced in the presence of other vehicle exhaust constituents to an extent which may account for the episodic peak concentrations of nitrogen dioxide.