Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 18
Articles | Volume 26, issue 18
https://doi.org/10.5194/acp-26-13103-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-13103-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 18
Research article
 | 
17 Sep 2026
Research article |  | 17 Sep 2026

Evidence for the impact of fire activity on daily variations of IASI mid-tropospheric CO2 anomalies at 8–11 km over South America: a pyroconvective fingerprint

Victor Bon, Cyril Crevoisier, and Virginie Capelle

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Short summary
To understand how fires influence climate, we need to understand the transport of their emissions. Using satellite observations, we detected day-to-day evolution of carbon dioxide high in the atmosphere (8–11 km) and traced the air back in time to identify fire sources. We showed that carbon dioxide and fire activity daily variability were strongly linked. Also, comparing observation data and a widely used modelling system showed model failed to reproduce the largest events.
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