Wildfire Knowledge Graph · Fuels & Weather
An atmospheric layer in which temperature increases with height, suppressing vertical mixing and potentially trapping smoke.
In plain language
An atmospheric layer in which temperature increases with height, suppressing vertical mixing and potentially trapping smoke.
Why it matters
Temperature Inversion is useful because it separates one specific part of wildfire behaviour, exposure, operations or evidence from nearby concepts that can otherwise be mixed together.
Temperature inversion: a vertical profile, not a weather forecast
A temperature inversion is a layer in which air temperature increases with height, opposite to the common average decrease through much of the lower troposphere. Inversions can suppress certain kinds of vertical mixing and contribute to the accumulation of pollutants in particular terrain and weather conditions.
Not every inversion traps wildfire smoke at the surface, and not every smoky day requires an inversion. The outcome depends on emission location, boundary-layer dynamics, wind, terrain, mixing depth and the vertical placement of the smoke plume.
Interpretation example: a visible smoke layer in a valley at sunrise may be consistent with stable overnight conditions, but the photograph alone cannot establish the inversion’s height or temperature gradient. Vertical atmospheric observations or appropriately evaluated model profiles are required.
For indoor-air planning, a temporary outdoor improvement should not be inferred merely from sunrise or a wind change. Check current measured air quality and official forecasts, and consider how quickly outdoor smoke can enter a building.
Compare Atmospheric Stability, Mixing Height and Air Quality Index.