利用量子级联激光器测量上海城市大气中的一氧化氮和一氧化碳。

Measurements of NO and CO in Shanghai urban atmosphere by using quantum cascade lasers.

作者信息

Yuanyuan Tang, Wenqing Liu, Ruifeng Kan, Jianguo Liu, Yabai He, Yujun Zhang, Zhenyu Xu, Jun Ruan, Hui Geng

机构信息

Key Lab. of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.

出版信息

Opt Express. 2011 Oct 10;19(21):20224-32. doi: 10.1364/OE.19.020224.

DOI:10.1364/OE.19.020224

PMID:21997033

Abstract

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.

摘要

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。