Articles | Volume 22, issue 18
https://doi.org/10.5194/acp-22-12559-2022
https://doi.org/10.5194/acp-22-12559-2022
Research article
 | 
26 Sep 2022
Research article |  | 26 Sep 2022

Multi-axis differential optical absorption spectroscopy (MAX-DOAS) observations of formaldehyde and nitrogen dioxide at three sites in Asia and comparison with the global chemistry transport model CHASER

Hossain Mohammed Syedul Hoque, Kengo Sudo, Hitoshi Irie, Alessandro Damiani, Manish Naja, and Al Mashroor Fatmi

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Cited articles

Amnuaylojaroen, T., Inkom, J., Janta, R., and Surapipith, V.: Long range transport of southeast asian PM2.5 pollution to northern Thailand during high biomass burning episodes, Sustainability, 12, 10049, https://doi.org/10.3390/su122310049, 2020. 
Arlander, D., Brüning, D., Schmidt, U., and Ehhalt, D.: The tropospheric distribution of formaldehyde during TROPOZ II, J. Atmos. Chem., 22, 251–269, https://doi.org/10.1007/BF00696637, 1995. 
Bauwens, M., Verreyken, B., Stavrakou, T., Müller, J. F., and De Smedt, I.: Spaceborne evidence for significant anthropogenic VOC trends in Asian cities over 2005–2019, Environ. Res. Lett., 17, 015008, https://doi.org/10.1088/1748-9326/ac46eb, 2022. 
Biswas, M. S. and Mahajan, A. S.: Year-long Concurrent MAX-DOAS Observations of Nitrogen Dioxide and Formaldehyde at Pune: Understanding Diurnal and Seasonal Variation Drivers, Aerosol Air Qual. Res., 21, 200524, https://doi.org/10.4209/aaqr.200524, 2021. 
Biswas, M. S., Ghude, S. D., Gurnale, D., Prabhakaran, T., and Mahajan, A. S.: Simultaneous Observations of Nitrogen Dioxide, Formaldehyde and Ozone in the Indo-Gangetic Plain, Aerosol Air Qual. Res., 19, 1749–1764, https://doi.org/10.4209/aaqr.2018.12.0484, 2019. 
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Short summary
Nitrogen dioxide (NO2) and formaldehyde (HCHO) are essential trace graces regulating tropospheric ozone chemistry. These trace constituents are measured using an optical passive remote sensing technique. In addition, NO2 and HCHO are simulated with a computer model and evaluated against the observations. Such evaluations are essential to assess model uncertainties and improve their predictability. The results yielded good agreement between the two datasets with some discrepancies.
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