Articles | Volume 24, issue 14
https://doi.org/10.5194/acp-24-8225-2024
https://doi.org/10.5194/acp-24-8225-2024
Research article
 | 
22 Jul 2024
Research article |  | 22 Jul 2024

Changes in South American surface ozone trends: exploring the influences of precursors and extreme events

Rodrigo J. Seguel, Lucas Castillo, Charlie Opazo, Néstor Y. Rojas, Thiago Nogueira, María Cazorla, Mario Gavidia-Calderón, Laura Gallardo, René Garreaud, Tomás Carrasco-Escaff, and Yasin Elshorbany

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Latest update: 29 Nov 2024
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Short summary
Trends of surface ozone were examined across South America. Our findings indicate that ozone trends in major South American cities either increase or remain steady, with no signs of decline. The upward trends can be attributed to chemical regimes that efficiently convert nitric oxide into nitrogen dioxide. Additionally, our results suggest a climate penalty for ozone driven by meteorological conditions that favor wildfire propagation in Chile and extensive heat waves in southern Brazil.
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