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Under which condition can morning fog dissipate quickly after sunrise?

Answer and explanation

Correct answer: Surface heating moves the air away from saturation

Correct answer: A. Fog consists of tiny water droplets suspended near the ground. After sunrise, heating of the surface can warm the nearby air. At a given amount of water vapour, warmer air has a higher saturation vapour pressure, so its relative humidity falls and it moves away from saturation. The droplets can then evaporate, thinning the fog and improving visibility. This depends on local conditions; warming does not always clear fog quickly.

Related tags

Fog DissipationRelative HumidityHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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