Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 5
Articles | Volume 26, issue 5
https://doi.org/10.5194/acp-26-3783-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-3783-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 5
Research article
 | 
17 Mar 2026
Research article |  | 17 Mar 2026

Global NO2 changes between 2019 and 2024 as observed by TROPOMI in urban areas and emerging hotspots

Daniel E. Huber, Gaige H. Kerr, M. Omar Nawaz, Sara Runkel, Susan C. Anenberg, and Daniel L. Goldberg

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Short summary
We used satellite data to track air pollution in over 11,000 cities worldwide from 2019 to 2024. Nitrogen dioxide levels fell in many cities in Asia, Europe, and North America, but rose in parts of Africa and the Middle East. We found signs of nitrogen dioxide changes from fossil fuel use, conflict and mining operations. These findings show how satellites can help track pollution and highlight where official data on emissions may be wrong or incomplete.
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