Wildfire Knowledge Graph · Fuels & Weather
The tendency of the atmosphere to resist or enhance vertical motion, affecting plume rise, turbulence and fire–atmosphere interaction.
In plain language
The tendency of the atmosphere to resist or enhance vertical motion, affecting plume rise, turbulence and fire–atmosphere interaction.
Why it matters
Atmospheric Stability is useful because it separates one specific part of wildfire behaviour, exposure, operations or evidence from nearby concepts that can otherwise be mixed together.
Atmospheric stability: why smoke mixing changes through the day
Atmospheric stability describes how the environment responds to vertical displacement of air. Stable layers tend to resist vertical motion, while unstable layers can favour rising and mixing air. The effect depends on the vertical temperature structure, moisture and parcel conditions.
During wildfire smoke events, near-surface stable layers can contribute to poor dispersion, while changes in daytime heating or wind may promote mixing and change smoke distribution. Strong convective heating from an intense fire may create additional plume dynamics that require specialised meteorological analysis.
Field example: a valley can experience weak winds and concentrated smoke overnight, followed by a change in mixing conditions after sunrise. This does not imply every valley will behave the same way or that air quality will automatically improve at a fixed clock time.
To describe atmospheric stability, preserve radiosonde, model or station source; observation time; terrain context; and the method used to interpret the profile. A single surface temperature and humidity reading is not enough to diagnose the complete vertical atmosphere.
Related: Temperature Inversion, Plume Rise and Smoke and Indoor Air.