weather theoryFAA-published question bank (Private Pilot, 2008)
The most frequent type of ground or surface-based temperature inversion is that which is produced by
A
terrestrial radiation on a clear, relatively still night.✓ Correct Answer
B
warm air being lifted rapidly aloft in the vicinity of mountainous terrain.
C
the movement of colder air under warm air, or the movement of warm air over cold air.
Explanation
The most common surface-based inversion forms on clear, relatively calm nights when the ground loses heat by terrestrial radiation and cools the air in contact with it, leaving warmer air above. Frontal inversions and air moving over colder air also occur, but radiation inversions are the most frequent surface-based type.
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