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Warm moist air moves over a cold surface near a coast and cools horizontally into droplets. Which type of fog is this?

Answer and explanation

Correct answer: Advection fog

Correct answer: C, advection fog. The word advection refers to the horizontal movement of air. In this case, warm, moist air travels over a colder land or water surface. Contact with the cold surface cools the moving air to its dew point, so condensation produces suspended droplets and fog. A, radiation fog, forms mainly because the ground and nearby air cool by night-time radiation, often under clear and calm conditions; horizontal transport is not the defining clue. B, upslope fog, forms when moist air is forced to rise along a slope and cools adiabatically. D, dust fog, is not the standard process described here. Memory cue: horizontal movement over a cold surface means advection fog.

Related tags

GeographyFogAdvection-FogCoastal-ClimateForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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