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If cloud base suddenly becomes lower in an area, what moisture indication is likely?

Answer and explanation

Correct answer: Air needs less uplift to reach saturation

Correct answer: A. The cloud base is closely related to the lifting condensation level, the height at which rising air cools enough to become saturated and cloud begins to form. When the air already contains more moisture, its temperature and dew-point temperature are closer together. It then reaches saturation after only a small amount of lifting, so the cloud base is lower. A lower cloud base therefore commonly indicates moist air or a smaller temperature–dew-point spread. B and C are opposite to the likely condition because very dry air generally requires more lifting before saturation. D is also incorrect: a lower cloud base does not mean solar radiation is zero. It may affect sunlight, but it does not define the moisture condition. Memory cue: “More moisture, less lift, lower cloud.”

Related tags

Cloud BaseLifting Condensation LevelHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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