The lowest temperature is observed/ recorded in which one of the follo

The lowest temperature is observed/ recorded in which one of the following layers of the atmosphere?

Stratosphere
Mesosphere
Thermosphere
Troposphere
This question was previously asked in
UPSC CAPF – 2018
The lowest temperature in the atmosphere is observed/recorded in the Mesosphere.
– The atmosphere is divided into several layers based on temperature profiles: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.
– In the Troposphere, temperature generally decreases with altitude.
– In the Stratosphere, temperature increases with altitude due to the absorption of ultraviolet radiation by the ozone layer.
– In the Mesosphere, temperature again decreases with altitude. The coldest temperatures in the Earth’s atmosphere, often dropping below -90°C (-130°F), are found at the top of the mesosphere (the mesopause).
– In the Thermosphere, temperature increases sharply with altitude due to the absorption of high-energy solar radiation.
The mesopause, the boundary between the mesosphere and the thermosphere, is typically the coldest region of the entire atmosphere. Meteors often burn up in the mesosphere.