Impact of western Pacific subtropical high on ozone pollution over eastern China

Jiang, Zhongjing; Li, Jing; Lu, Xiao; Gong, Cheng; Zhang, Lin; Liao, Hong

doi:https://doi.org/10.5194/acp-21-2601-2021

Articles | Volume 21, issue 4

https://doi.org/10.5194/acp-21-2601-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-2601-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 4

Research article

|

22 Feb 2021

Research article |

| 22 Feb 2021

Impact of western Pacific subtropical high on ozone pollution over eastern China

Zhongjing Jiang, Jing Li, Xiao Lu, Cheng Gong, Lin Zhang, and Hong Liao

Supplement

https://doi.org/10.5194/acp-21-2601-2021-supplement

Data sets

File Specification for GEOS-5 FP, GMAO Office Note No. 4 (version 1.0) R. Lucchesi http://gmao.gsfc.nasa.gov/pubs/office_notes

ERA5 monthly averaged data on single levels from 1979 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS) H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.f17050d7

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

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Short summary

This study demonstrates that the intensity of the western Pacific subtropical high (WPSH), a major synoptic pattern in the northern Pacific during summer, can induce a dipole change in surface ozone pollution over eastern China. Ozone concentration increases in the north and decreases in the south during the strong WPSH phase, and vice versa. The change in chemical processes associated with the WPSH change plays a decisive role, whereas the natural emission of ozone precursors accounts for ~ 30 %.