Impact of eastern and central Pacific El Niño on lower tropospheric ozone in China

Jiang, Zhongjing; Li, Jing

doi:https://doi.org/10.5194/acp-22-7273-2022

Articles | Volume 22, issue 11

https://doi.org/10.5194/acp-22-7273-2022

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

https://doi.org/10.5194/acp-22-7273-2022

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

Articles | Volume 22, issue 11

Research article

|

07 Jun 2022

Research article |

| 07 Jun 2022

Impact of eastern and central Pacific El Niño on lower tropospheric ozone in China

Zhongjing Jiang and Jing Li

Supplement

https://doi.org/10.5194/acp-22-7273-2022-supplement

Data sets

MERRA-2: File Specification (http://ftp.as.harvard.edu/gcgrid/data/GEOS_2x2.5/MERRA2/) M. G. Bosilovich, R. Lucchesi, and M. Suarez, M. http://gmao.gsfc.nasa.gov/pubs/office_notes

Ozone monthly gridded data from 1970 to present derived from satellite observations Copernicus https://doi.org/10.24381/cds.4ebfe4eb

Model code and software

geoschem/geos-chem: GEOS-Chem 12.3.2 (Version 12.3.2) Bob Yantosca https://doi.org/10.5281/zenodo.2658178

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Short summary

This study investigates the changes of tropospheric ozone in China associated with EP and CP El Niño, using satellite observations and the GEOS-Chem model. We found that El Niño generally leads to lower tropospheric ozone (LTO) decrease over most parts of China; La Niña acts the opposite. The difference between LTO changes during EP and CP El Niño primarily lies in southern China. Regional transport and chemical processes play the leading and secondary roles in driving the LTO changes.