Articles | Volume 11, issue 12
Atmos. Meas. Tech., 11, 6719–6734, 2018
https://doi.org/10.5194/amt-11-6719-2018

Special issue: Advances in cavity-based techniques for measurements of atmospheric...

Atmos. Meas. Tech., 11, 6719–6734, 2018
https://doi.org/10.5194/amt-11-6719-2018

Research article 19 Dec 2018

Research article | 19 Dec 2018

Analysis of spatial and temporal patterns of on-road NO2 concentrations in Hong Kong

Ying Zhu et al.

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Latest update: 08 May 2021
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Short summary
The paper presents an investigation of spatio-temporal variability of street-level NO2 in Hong Kong using mobile cavity-enhanced differential optical absorption spectroscopy (DOAS) and long-path DOAS. Measurements were conducted in December 2010 and March 2017. A significant decreasing trend in on-road NO2 was found by comparing measurements taken in 2010 and 2017. Influences of changes in bus companies' operation strategies can also be observed from the measured NO2 concentration maps.