How does a temperature inversion affect smoke behavior?

How does a temperature inversion affect smoke behavior?

• A. Inversions move smoke into higher layers, leaving ground-level visibility largely unchanged.
• B. Inversions trap smoke near the ground, reducing visibility and potentially increasing surface fire persistence and instability.
• C. Inversions cause smoke to rise and dissipate quickly
• D. Inversions have no effect on wind or smoke

Answer: (B)

A temperature inversion acts like a lid on the atmosphere: cool air near the ground is topped by warmer air, creating a stable layer that resists vertical mixing. Smoke from a wildfire, which would normally rise and disperse upward, gets trapped in this lower layer. The result is smoky air at ground level with greatly reduced visibility, making it harder to see and to work safely around the fire. Because the heat and smoke stay near the surface where the fuels are burning, surface fire behavior can become more persistent and the atmosphere can feel more unstable, especially if the inversion weakens and mixing resumes suddenly, lifting the smoke and plume.

A temperature inversion acts like a lid on the atmosphere: cool air near the ground is topped by warmer air, creating a stable layer that resists vertical mixing. Smoke from a wildfire, which would normally rise and disperse upward, gets trapped in this lower layer. The result is smoky air at ground level with greatly reduced visibility, making it harder to see and to work safely around the fire. Because the heat and smoke stay near the surface where the fuels are burning, surface fire behavior can become more persistent and the atmosphere can feel more unstable, especially if the inversion weakens and mixing resumes suddenly, lifting the smoke and plume.