Rapid increases in ozone concentrations over the Tibetan Plateau caused by local and non-local factors

Xu, Chenghao; Lin, Jintai; Kong, Hao; Jin, Junli; Chen, Lulu; Xu, Xiaobin

doi:https://doi.org/10.5194/acp-25-9545-2025

Articles | Volume 25, issue 16

https://doi.org/10.5194/acp-25-9545-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-9545-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 16

Research article

|

29 Aug 2025

Research article |

| 29 Aug 2025

Rapid increases in ozone concentrations over the Tibetan Plateau caused by local and non-local factors

Chenghao Xu, Jintai Lin, Hao Kong, Junli Jin, Lulu Chen, and Xiaobin Xu

Supplement

https://doi.org/10.5194/acp-25-9545-2025-supplement

Data sets

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

MERRA-2 tavg1_2d_flx_Nx: 2d,1-Hourly, Time-Averaged, Single-Level, Assimilation, Surface Flux Diagnostics V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/7MCPBJ41Y0K6

MERRA-2 tavg1_2d_int_Nx: 2d,1-Hourly, Time-Averaged, Single-Level, Assimilation, Vertically Integrated Diagnostics V5.12.4 Global Modeling and Assimilation Office (GMAO): , Goddard Earth Sciences https://doi.org/10.5067/Q5GVUVUIVGO7

MERRA-2 tavg1_2d_slv_Nx: 2d,1-Hourly, Time-Averaged, Single-Level, Assimilation, Single-Level Diagnostics V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/VJAFPLI1CSIV

MERRA-2 tavg3_3d_asm_Nv: 3d,3-Hourly, Time-Averaged, Model-Level, Assimilation, Assimilated Meteorological Fields V5.12.4 Global Modeling and Assimilation Office (GMAO) https://doi.org/10.5067/SUOQESM06LPK

CEDS v-2021-02-05 Emission Data 1975–2019 (Feb-05-2021) Patrick R. O'Rourke et al. https://doi.org/10.5281/zenodo.4509372

Download

Article (6349 KB)
Full-text XML

Short summary

We observed a strong increase in deseasonalized ozone at urban stations in the Tibetan Plateau from 2015 to 2019, far exceeding the trend at the baseline station Waliguan and the Tibetan Plateau average trend of four tropospheric ozone products. By combining multiple datasets and modeling approaches, we identified the main contributing factors as more frequent transport passing through the lower layers of high-emission regions and the increase in local and non-local anthropogenic emissions.