Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 18
Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-10643-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-10643-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 18
Research article
 | 
17 Sep 2025
Research article |  | 17 Sep 2025

Relation between total vertical column density and near-surface NO2 based on in situ and Pandora ground-based remote sensing observations

Ying Zhang, Yuanyuan Wei, Gerrit de Leeuw, Ouyang Liu, Yu Chen, Yang Lv, Yuanxun Zhang, and Zhengqiang Li

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Short summary
Nitrogen dioxide (NO2) is a major pollutant that, at high concentrations, may affect human health. We evaluated the remote sensing column NO2 in relation to near-surface concentrations throughout the day and found that the prohibition of vertical transport in the morning and the mixing in the afternoon resulted in different relations between the near-surface (NS) and total column NO2 concentrations. These different relationships have consequences for the use of satellite remote sensing to estimate NS NO2 concentrations.
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