Articles | Volume 23, issue 1
https://doi.org/10.5194/acp-23-551-2023
https://doi.org/10.5194/acp-23-551-2023
Research article
 | 
13 Jan 2023
Research article |  | 13 Jan 2023

Quantifying daily NOx and CO2 emissions from Wuhan using satellite observations from TROPOMI and OCO-2

Qianqian Zhang, K. Folkert Boersma, Bin Zhao, Henk Eskes, Cuihong Chen, Haotian Zheng, and Xingying Zhang

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Cited articles

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Berezin, E. V., Konovalov, I. B., Ciais, P., Richter, A., Tao, S., Janssens-Maenhout, G., Beekmann, M., and Schulze, E. D.: Multiannual changes of CO2 emissions in China: indirect estimates derived from satellite measurements of tropospheric NO2 columns, Atmos. Chem. Phys., 13, 9415–9438, https://doi.org/10.5194/acp-13-9415-2013, 2013. 
CDS: ERA5 hourly data on pressure levels from 1959 to present, CDS [data set], https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-pressure-levels?tab=overview, last access: 11 January 2023. 
Ding, J., van der A, R. J., Eskes, H. J., Mijling, B., Stavrakou, T., Geffen, J. H. G. M., and Veefkind, J. P.: NOx Emissions Reduction and Rebound in China Due to the COVID-19 Crisis, Geophys. Res. Lett., 47, e2020GL089912, https://doi.org/10.1029/2020gl089912, 2020. 
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Short summary
We developed an improved superposition column model and used the latest released (v2.3.1) TROPOMI satellite NO2 observations to estimate daily city-scale NOx and CO2 emissions. The results are verified against bottom-up emissions and OCO-2 XCO2 observations. We obtained the day-to-day variation of city NOx and CO2 emissions, allowing policymakers to gain real-time information on spatial–temporal emission patterns and the effectiveness of carbon and nitrogen regulation in urban environments.
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