Dew point temperature represents that

[amp_mcq option1=”thin layer of air near the ground surface has become cold enough to condensate” option2=”there is thorough mixing of air” option3=”evaporation has exceeded condensation” option4=”the night temperature is warm” correct=”option1″]

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UPSC Geoscientist – 2022

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The dew point temperature is defined as the temperature to which air must be cooled at constant pressure and humidity for water vapor to condense into liquid water (dew). When the air near the ground surface cools down to this temperature, it becomes saturated, and any further cooling leads to condensation, forming dew.

– Dew point is the temperature of saturation for water vapor.
– Condensation occurs when air cools to or below the dew point.
– Dew forms when surface air cools to the dew point temperature.

Relative humidity is 100% at the dew point. The difference between the air temperature and the dew point indicates how close the air is to saturation. A smaller difference means higher relative humidity.

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