As air sinks in a valley fog it

A. cools adiabatically but it is still warmer than surrounding air; surrounding air is cooled to the dew-point.
B. warms adiabatically but it is still cooler than surrounding air; surrounding air is cooled to the dew-point.
C. cools adiabatically but it is still cooler than surrounding air; surrounding air is cooled to the dew-point.
D. warms adiabatically but it is still warmer than surrounding air; surrounding air is warmed to the dew-point.


Answer: B

Environmental & Atmospheric Sciences

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