Discrepancy in assimilated atmospheric CO over East Asia in 2015–2020 by assimilating satellite and surface CO measurements

Tang, Zhaojun; Chen, Jiaqi; Jiang, Zhe

doi:https://doi.org/10.5194/acp-22-7815-2022

Articles | Volume 22, issue 11

https://doi.org/10.5194/acp-22-7815-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-7815-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 11

Research article

|

16 Jun 2022

Research article |

| 16 Jun 2022

Discrepancy in assimilated atmospheric CO over East Asia in 2015–2020 by assimilating satellite and surface CO measurements

Zhaojun Tang, Jiaqi Chen, and Zhe Jiang

Data sets

GEOS-Chem v12.8.1 GEOS-Chem v12.8.1 http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_12#12.8.1

Historical air quality data in China X. L. Wang https://quotsoft.net/air/

Short summary

We provide a comparative analysis to explore the effects of satellite and surface measurements on atmospheric CO in data assimilations in 2015–2020 over East Asia. We find possible overestimated enhancements of atmospheric CO by assimilating surface CO measurements due to model representation errors, and a large discrepancy in the derived trends of CO columns due to different vertical sensitivities of satellite and surface observations to lower and free troposphere.