What is plume rise?
NWCG defines plume rise as how high above the level of release an emission plume rises.
Why plume rise matters
Plume rise controls where smoke is injected into the atmosphere. Smoke injected higher can encounter different wind speed, direction, stability and transport pathways than smoke remaining close to the surface.
What controls plume rise?
- Fire heat release and buoyancy.
- Atmospheric stability.
- Ambient wind and vertical wind shear.
- Entrainment of surrounding air.
- Terrain and boundary-layer structure.
Plume rise vs plume height
Plume rise is the vertical increase above the release level. Plume-top height is an altitude or height reference for the top of the plume. These are related but not identical quantities.
Plume rise vs mixing height
Mixing height describes the turbulent atmospheric layer; plume rise describes the response of a specific emission plume. An energetic fire plume can interact with or penetrate stable layers.
Knowledge Graph chain
Heat Release → Buoyancy → Plume Rise → Smoke Plume → Transport / Dispersion → Downwind PM2.5
Technical reference
Tecnobosque Reference Concept · reviewed September 2026. Preserve the release-level reference when interpreting plume-rise values.