When does an inversion occur?

An inversion occurs when the surface air is cooler than the air above it. This phenomenon typically happens under certain atmospheric conditions where a layer of warm air traps cooler air near the ground. As a result, the cooler air can't rise, leading to a stable atmospheric condition that can significantly impact weather patterns, air quality, and the behavior of pollutants and pesticides in the environment.

When surface air is cooler and is overlain by warmer air, it creates a temperature gradient that suppresses vertical mixing of the atmosphere. This can lead to various implications, such as the accumulation of pollutants at the surface level and the persistence of fog or low clouds. Understanding this concept is vital for pesticide applicators, as it affects how and when they can apply pesticides safely and effectively.