Yuanyuan Tang, Wenqing Liu, Ruifeng Kan, Jianguo Liu, Yabai He, Yujun Zhang, Zhenyu Xu, Jun Ruan, Hui Geng
Key Lab. of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Opt Express. 2011 Oct 10;19(21):20224-32. doi: 10.1364/OE.19.020224.
Nitric oxide (NO) and carbon monoxide (CO) in Shanghai urban atmosphere have been measured during the EXPO 2010 by an optical trace gas monitoring system based on room-temperature pulsed quantum cascade lasers (QCL). The results showed obvious diurnal variation in their concentrations. A great correlation was found by analyzing the diurnal variation, indicating common emission sources for both NO and CO. However analysis of the data from street canyon measurements showed that on a vehicle-by-vehicle basis NO emissions correlated only weakly with CO emissions. A possible explanation to this issue has been given.
2010年世博会期间，利用基于室温脉冲量子级联激光器（QCL）的光学痕量气体监测系统，对上海城市大气中的一氧化氮（NO）和一氧化碳（CO）进行了测量。结果表明，它们的浓度呈现出明显的日变化。通过分析日变化发现两者具有很强的相关性，表明NO和CO有共同的排放源。然而，对街道峡谷测量数据的分析表明，逐辆车来看，NO排放与CO排放的相关性较弱。针对这一问题给出了一种可能的解释。
