Which of the following statements concerning atmosphere of the Earth a

Which of the following statements concerning atmosphere of the Earth are correct?

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1. In stratosphere, temperature increases with altitude.
2. In mesosphere, temperature decreases with altitude.
3. The lowest temperature of the atmosphere is recorded in the upper part of mesosphere.
4. Tropopause is an isothermal zone.

Select the correct answer using the code given below.

1 and 2 only

1, 2 and 3 only

3 and 4 only

1, 2, 3 and 4

Answer is Right!

Answer is Wrong!

This question was previously asked in

UPSC CDS-2 – 2016

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Statements 1, 2, and 3 regarding the Earth’s atmosphere are correct.

Statement 1 is correct: In the stratosphere, temperature increases with altitude due to the absorption of ultraviolet radiation by the ozone layer. Statement 2 is correct: In the mesosphere, temperature decreases sharply with altitude, reaching very low temperatures at its upper boundary. Statement 3 is correct: The mesopause, located at the top of the mesosphere, is the coldest region of the Earth’s atmosphere. Statement 4 is generally considered incorrect: The tropopause is the boundary zone between the troposphere and stratosphere where the temperature lapse rate changes significantly; it’s not a thick isothermal layer, although temperature changes minimally with height within the boundary itself compared to the layers above and below.

The atmosphere’s temperature profile varies with altitude through its different layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer exhibits distinct temperature gradients driven by different physical processes.

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