Articles | Volume 21, issue 20
https://doi.org/10.5194/acp-21-15447-2021
https://doi.org/10.5194/acp-21-15447-2021
Research article
 | 
15 Oct 2021
Research article |  | 15 Oct 2021

OMI-observed HCHO in Shanghai, China, during 2010–2019 and ozone sensitivity inferred by an improved HCHO ∕ NO2 ratio

Danran Li, Shanshan Wang, Ruibin Xue, Jian Zhu, Sanbao Zhang, Zhibin Sun, and Bin Zhou

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Latest update: 21 Nov 2024
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Short summary
Satellite-observed HCHO / NO2 ratios are usually used to infer the O3 formation sensitivity regime. However, it only provides the one ratio around overpass time per day. In order to better characterize the O3 formation during the daytime, we proposed to introduce the surface-observed hourly O3 concentration increment and HCHO / NO2 to correct the satellited-observed HCHO / NO2. Moreover, the temporal and spatial variations of HCHO VCDs and the influencing factors in Shanghai were investigated.
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