Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 20
Articles | Volume 25, issue 20
https://doi.org/10.5194/acp-25-13849-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-13849-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 20
Measurement report
 | 
27 Oct 2025
Measurement report |  | 27 Oct 2025

Measurement report: Six-year DOAS observations reveal post-2020 rebound of ship SO2 emissions in a Shanghai port despite low-sulfur fuel policies

Jiaqi Liu, Shanshan Wang, Yan Zhang, Sanbao Zhang, Yuhao Yan, Zimin Han, and Bin Zhou

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Short summary
A 6-year study in a Shanghai port shows that during a low-sulfur fuel policies adjustment phase (2018–2020), ship pollution decreased by 43.47 % and 23.08 % yearly, but emissions rebounded by 19.5 % yearly post-2020 as shipping grew. Using air sensors and data analysis, researchers identified cargo ships as key polluters and created a cost-effective monitoring method for global ports. Findings warn that shipping expansion risks air quality progress, urging smarter policies while supporting trade.
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