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?

1. 1 only
2. 2 only
3. Both 1 and 2
4. Neither 1 nor 2

Explanation

Statement 1 is correct

• The lower stratosphere is relatively dry compared to the troposphere. Due to the absence of significant water vapour and clouds, flying conditions are clearer and more stable for jet aircraft.

Statement 2 is correct

• The stratosphere is characterised by a lack of vertical convection currents (vertical winds), unlike the troposphere. This creates smoother flying conditions, which is why jet aircraft often cruise at this altitude.

Answer: (c) Both 1 and 2 | Difficulty Level: Easy