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If precipitation has to reach the ground as snow what should be the condition of lower air layers?

Answer and explanation

Correct answer: Layers should remain cold enough

Answer: A. Snowflakes form in cold clouds, but their final form at the ground depends on the temperature profile through the entire lower atmosphere. As a snowflake falls, it can melt if it passes through a sufficiently warm layer; after melting, it reaches the ground as rain or may become another form of precipitation depending on the layers below. Therefore, for snow to reach the surface, the lower air must remain cold enough, or at least must not contain a sufficiently deep warm layer to melt the flakes. B is wrong because warm layers promote melting. C is wrong because air is required for atmospheric precipitation and the absence of air is not the relevant condition. D is meaningless and physically incorrect. Memory cue: follow the snowflake from cloud to ground, not just the cloud temperature; the whole vertical temperature profile matters.

Related tags

SnowfallTemperature ProfileSolid PrecipitationMeltingClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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