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What can be a common reason for fog dispersal?

Answer and explanation

Correct answer: Heating of surface and lower air by the Sun

Correct answer: A. After sunrise, solar radiation can warm the ground and the air immediately above it. Warmer air can hold more water vapour, so if the amount of vapour does not increase equally, relative humidity falls. The tiny droplets forming fog may then evaporate, and visibility improves. A is correct because surface and lower-air warming commonly removes the conditions that maintain fog. B is wrong because further cooling generally supports saturation and can maintain or intensify fog. C is wrong because water vapour does not become stone; this is not a meteorological process. D is not a cause of dispersal; zero visibility would describe a continuing severe obstruction. Memory cue: morning heating often clears fog by lowering relative humidity and evaporating droplets.

Related tags

Fog DispersalHeatingRelative HumidityVisibilityForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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