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If the atmospheric column has moisture but a dry layer in the middle what effect can occur on surface rainfall?

Answer and explanation

Correct answer: The dry layer can reduce or evaporate falling particles

Answer: A. Rainfall reaching the ground depends on the entire air column, not only on moisture inside the cloud. Precipitation particles may form in a moist upper layer and begin falling, but a dry middle layer can increase evaporation from their surfaces. Small droplets may disappear, and larger particles may be reduced before reaching the ground. Therefore measured surface rainfall can be lower than the amount suggested by the cloud. B says “always” and has no physical basis. C is impossible because atmospheric dryness cannot turn hail into lava. D ignores the important path through which particles must fall. Memory cue: inspect the air below the cloud, not just the cloud itself.

Related tags

Air ColumnDry LayerPrecipitationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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