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

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

doi:https://doi.org/10.5194/acp-23-551-2023

Articles | Volume 23, issue 1

https://doi.org/10.5194/acp-23-551-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-551-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 1

Research article

|

13 Jan 2023

Research article |

| 13 Jan 2023

Quantifying daily NO_x 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

Supplement

https://doi.org/10.5194/acp-23-551-2023-supplement

Data sets

ERA5 hourly data on pressure levels from 1959 to present CDS https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-pressure-levels?tab=overview

OCO-2 Level 2 bias-corrected XCO2 and other select fields from the full-physics retrieval aggregated as daily files, Retrospective processing V10r M. Gunson and A. Eldering https://doi.org/10.5067/E4E140XDMPO2

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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 NO_x 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 NO_x 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.