Wildland fire entrainment: The missing link between wildland fire and its environment

Area of Science:

• Environmental science
• Atmospheric science
• Fire science

Background:

• Wildfires pose increasing threats, necessitating accurate spread and intensity prediction.
• Current models fail to capture critical fire-atmosphere interactions and environmental influences.
• This inadequacy limits predictions under novel fuel and climate conditions.

Purpose of the Study:

• Introduce a new mechanism, wildland fire entrainment (WFE), for improved fire behavior modeling.
• Explain WFE's role in integrating environmental factors for more accurate spread predictions.
• Bridge advances in combustion research with dynamic wildland fire environments.

Main Methods:

• Conceptualized wildland fire entrainment (WFE) as a dominant fire-atmospheric feedback.
• Defined WFE as fluid motion driven by buoyant updrafts and pressure gradients.
• Integrated nonlocal influences, fuels, topography, winds, and fire geometry into the WFE concept.

Main Results:

• WFE dynamically integrates environmental factors to predict fire spread rate and pattern.
• The mechanism explicitly incorporates fire-induced buoyancy.
• WFE links idealized combustion research to real-world wildland fire dynamics.

Conclusions:

• Wildland fire entrainment (WFE) offers a novel perspective on fire-atmosphere feedback.
• Integrating WFE into models will enhance predictions of wildland fire behavior and spread.
• This approach is crucial for managing ecological and societal impacts of increasingly severe wildfires.