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Why can the night-time minimum temperature remain relatively higher when the air contains more moisture?

Answer and explanation

Correct answer: Because water vapour absorbs longwave radiation and reduces surface heat loss

The correct answer is A. At night, the surface loses energy by emitting longwave radiation. Water vapour absorbs some of this outgoing radiation and re-emits energy in different directions, including toward the surface. This can reduce the surface’s net heat loss, so under otherwise similar conditions a moist night may have a relatively higher minimum temperature than a very dry night.

Related tags

Water VapourLongwave RadiationNight TemperatureHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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