Multiple Choice Questions

Regarding the phenomenon of Temperature inversions consider the following statements It a reversal o...........

Geography and Environment (CSC) World climates

Regarding the phenomenon of Temperature inversions, consider the following statements

It a reversal of the normal behaviour of temperaturein the troposphere.
Inversions also cause intense thunderstorms and tornadoes because of the energy trapped high up in the atmosphere.
Air density increases with increasing height during an inversion.

How many of the statements given above is/are correct?

Only One

Only Two

All Three

None

Only statements 1&2 are correct.

Statement 3rd is incorrect: Air density decreases with increasing height during an inversion. This causes a density stratification of the air, with the coolest, densest or heaviest air near the surface, and the density decreasing with increasing height. As a result, air can move only horizontally within the inversion.
Temperature inversions occur when a layer of warm air traps cool air near the Earth’s surface. This is the inverse of what normally happens.
Most of the time, for example, the Earth’s surface is warm during the day and air gets colder the higher you go.
A temperature inversion usually happens during the night when the ground temperature drops because it’s no longer heated by the sun.

Why in news?

Mumbai’s air quality has worsened than the National Capital's quality of air. The phenomenon called “air inversion” or temperature inversion is behind the situation.

Hence option 2nd is correct.

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