Under which condition would a temperature inversion typically occur?

Study for the ATPL Intensive Program Exam. Use multiple choice questions and flashcards, each with hints and explanations. Master your exam preparation and succeed!

A temperature inversion typically occurs on clear nights with calm winds because, under these conditions, the ground loses heat rapidly through radiation. As the ground cools, it cools the air immediately above it. If the air at the surface becomes cooler than the air above, an inversion layer is established, where warmer air traps cooler air below it. This phenomenon can lead to the formation of fog or low clouds and is often associated with stable atmospheric conditions.

Other conditions, such as hot sunny days, would not favor temperature inversions as warm air at the surface tends to rise, leading to convection and mixing of the atmosphere. Similarly, during midday in a desert environment, high temperatures usually result in unstable air rather than inversion conditions. Stormy conditions disrupt layering, mixing warmer and cooler air instead of allowing for the establishment of an inversion layer.

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