Study examines weather generated by fire itself
A Catalan fire service commander defends a thesis in Wageningen on Monday about sudden extreme fire behaviour.
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Extreme wildfires can change character within minutes because their smoke plumes affect the atmosphere. Marc Castellnou Ribau defends a thesis at Wageningen University & Research on Monday that seeks to better understand this interaction.
Castellnou is a fire service commander in Catalonia and a researcher at Wageningen University & Research. His doctoral research focuses on the transition from an ordinary wildfire to one that becomes so powerful that it begins to influence its own weather conditions. The defence takes place on Monday 12 October at Wageningen Campus.
For the research, weather balloons were launched in and around fire plumes. They measured temperature, humidity and wind, among other things. By combining these measurements with atmospheric models, the researchers examined how a plume develops before a so-called pyro-cloud forms: a cloud created by the heat and moisture of the fire.
An important part of the thesis is the role of so-called dry pyroconvection. This can allow a fire plume to penetrate deep into the atmosphere without immediately forming a visible thundercloud. According to the thesis, the layer of air created as a result can continue to influence fire behaviour even after sunset.
This helps explain why some extreme fires remain active at night, while lower temperatures and higher humidity would normally slow them down. The research describes a process model and a diagnostic framework. It does not yet provide a proven warning system that can be used everywhere.
The possible application lies with the fire service. If measurements in a smoke plume show at an early stage that a fire is entering a new phase of development, emergency services can adjust their operations, evacuations and safety margins sooner. Wageningen University & Research describes this as a foundation for future early-warning tools.
The status of the research is that of a thesis defended on Monday, not that of a completed operational system. The results should therefore be viewed as a scientific contribution to understanding extreme fires. The university links the subject to a climate in which conditions for extreme fire behaviour may occur more often, but the thesis itself does not predict when a specific fire will run out of control.
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This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The core claims come from the announcement and repository of Wageningen University & Research and from an earlier open scientific publication. The text explicitly presents possible applications as future prospects, not as a proven rescue technology.
- confirmed Marc Castellnou is defending a thesis at Wageningen University & Research on 12 October 2026. — The university gives the date, location and subject of the doctoral defence. source
- confirmed The research studies the interaction between fire plumes and the atmosphere. — This is stated in the official summary of the doctoral defence and the thesis repository. source
- confirmed Weather balloons were used to measure conditions in and around fire plumes. — The university summary and open publication describe measurements in fire plumes. source
- uncertain The research may provide a basis for early warning. — WUR cites this as a future practical foundation; there is no evidence that an operational system already exists. source
Editor's note
It is certain that Castellnou is defending a thesis at Wageningen on Monday and that the research studies fire plumes and atmospheric interaction. The possible application as an early warning is still a line of research, not a proven system.Sources
- Coupling Between Fire Plume Growth and Atmospheric Conditions — Wageningen University & Research
- Coupling between fire plume growth and atmospheric conditions — Wageningen University Research Portal
- Integrating fireline observations to characterize fire plumes — Atmospheric Measurement Techniques
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