Articles | Volume 21, issue 4
Atmos. Chem. Phys., 21, 2601–2613, 2021
https://doi.org/10.5194/acp-21-2601-2021
Atmos. Chem. Phys., 21, 2601–2613, 2021
https://doi.org/10.5194/acp-21-2601-2021

Research article 22 Feb 2021

Research article | 22 Feb 2021

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

Zhongjing Jiang et al.

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 %.
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