Traffic trace gases measurements by long-path DOAS over a busy urban road in Qingdao

Ying Song; Xianxin Li; Libin Du; Peng Ren; Zhangjun Wang; Xingtao Liu; Hui Li; Wei Deng; Xiufen Wang; Xiangqian Meng

doi:10.1117/12.2500454

24 July 2018 Traffic trace gases measurements by long-path DOAS over a busy urban road in Qingdao

Ying Song, Xianxin Li, Libin Du, Peng Ren, Zhangjun Wang, Xingtao Liu, Hui Li, Wei Deng, Xiufen Wang, Xiangqian Meng

Proceedings Volume 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018); 1082708 (2018) https://doi.org/10.1117/12.2500454
Event: Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 2018, Shanghai, China

Abstract

Observations of traffic trace gases near-surface concentration over a busy urban road in Qingdao were conducted by long-path differential optical absorption spectroscopy (LP-DOAS). During the observation period, the LP-DOAS system made long-term trace gases measurements over the Haier Road in Laoshan District, Qingdao. And a camera was placed next to the LP-DOAS system to record the traffic condition every day. The relationship between the trace gases measurements results and the traffic flow is presented in this paper. The weekly characteristics of the trace gases due to traffic influence are further studied in this paper. Using typical data on January 3 and March 22, 2018, the NO₂ concentration is under a strong positive correlation with the traffic flow, and O₃ concentration is under a negative correlation with the traffic flow. The correlation coefficient between NO₂ measurements and traffic flow from 7:00 to 18:00 is 0.86. The comparison of daily measurements during a week showed that the working days had much more trace gases content than the weekend which may be affected by the different traffic condition among working days and the weekend.

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Ying Song, Xianxin Li, Libin Du, Peng Ren, Zhangjun Wang, Xingtao Liu, Hui Li, Wei Deng, Xiufen Wang, and Xiangqian Meng "Traffic trace gases measurements by long-path DOAS over a busy urban road in Qingdao", Proc. SPIE 10827, Sixth International Conference on Optical and Photonic Engineering (icOPEN 2018), 1082708 (24 July 2018); https://doi.org/10.1117/12.2500454

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KEYWORDS

Gases

Roads

Absorption

Absorption spectroscopy

Cameras

Infrared cameras

Retroreflectors

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