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In which situation does radiation fog form more often?

Answer and explanation

Correct answer: Due to strong night-time cooling of the ground

Correct answer: A. Radiation fog develops when the ground loses heat rapidly at night, mainly by longwave radiation. The air touching the cooled ground also becomes colder. If it reaches the dew point and contains enough moisture, the lower air becomes saturated and tiny droplets form, creating fog. Clear skies and light winds commonly support this process because they allow surface cooling and prevent strong mixing. B is wrong because daytime heating usually warms and dries the near-surface air rather than producing radiation fog. C and D do not provide the required cooling-and-saturation mechanism. Memory cue: radiation fog is named for night-time radiational cooling of the ground.

Related tags

Radiation FogNight CoolingSaturationGround RadiationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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