Mesosphere: Coldest Atmospheric Layer
The lowest temperature in Earth's atmosphere is observed in the Mesosphere. This layer is located above the stratosphere and below the thermosphere.
Atmospheric Temperature Trends
Understanding the temperature changes in different atmospheric layers helps identify the coldest one:
- Troposphere: Temperature generally decreases with increasing altitude.
- Stratosphere: Temperature increases with altitude due to the absorption of UV radiation by the ozone layer.
- Mesosphere: Temperature decreases significantly with altitude, reaching the coldest temperatures in the entire atmosphere, averaging around -90°C (-130°F) at the top.
- Thermosphere: Temperature increases dramatically with altitude, but the air density is extremely low.
Therefore, the Mesosphere is characterized by the lowest observed temperatures.
Important Questions from Atmosphere
In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index?
1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen dioxide
4. Sulfur dioxide
5. Methane
Select the correct answer using the code given below.
A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
1) The presence of ozone causes the reflection of radio waves to Earth.
2) Radio waves have a very long wavelength.
Which of the statements given above is/are correct?
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
1) There are no clouds or water vapour in the lower stratosphere.
2) There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context?
The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
Which one of the following is associated with the issue of control and phasing out of the use of ozone-depleting substances?
