Q.

The layer where the decrease in temperature with increasing altitude is totally absent is –

A. Troposphere
B. Ionosphere
C. Stratosphere
D. Mesosphere
Answer» C. Stratosphere
Explanation: The stratosphere defines a layer in which temperatures rises with increasing altitude. At the top of the stratosphere the thin air may attain temperatures close to 0°C. This rise in temperature is caused by the absorption of ultraviolet (UV) radiation from the Sun by the ozone layer. Such a temperature profile creates very stable atmospheric conditions. Consequently, the stratosphere is almost completely free of clouds or other forms of weather.

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Physical Geography

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