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20june2019 paper1 Q38

38Assertion (A): Night time temperatures in the central parts of a city are generally higher than those over the surrounding rural areas.

Reason (R): Radiation losses over the urban areas are less than that over the rural areas.

Choose the correct answer from the options given below:

  • Option : A
  • Explanation : In cities, the air, surface and soil temperatures are almost always warmer than in rural areas. This effect is known as the Urban Heat Island (UHI). UHI is usually strongest at night, as street surfaces and the adjacent air cool slowly. Above the roof level, the contributions of streets and building roofs together warm the overlying urban atmosphere.
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