3.3.2 Stratosphere

Last updated at August 31, 2026 by

What lies just above the troposphere, and why do aeroplanes love flying there?
Stratosphere
Strato-
Latin for 'spread out'
-sphere
a layer
↓
A stable, cloud-free layer up to 50 km that contains the ozone layer.
  • The stratosphere lies above the troposphere.
  • It extends up to about 50 kilometres .
  • It is ideal for flying aeroplanes — free of clouds and weather.
  • It contains a layer of ozone gas .
  • Ozone shields us by filtering the Sun’s harmful radiation .
  • The stratopause marks its boundary with the mesosphere.
3.3.2 Stratosphere - Atmosphere and Climate - [Teachoo] - Concepts
So what exactly is this ozone layer that shields us from the Sun?
Ozone Layer
Ozone
special oxygen gas
Layer
concentrated zone
↓
A protective zone in the stratosphere that filters harmful ultraviolet radiation from the Sun.
  • The ozone layer sits inside the stratosphere.
  • It is a concentrated zone of ozone gas , a special form of oxygen.
  • It filters out the Sun’s harmful ultraviolet radiation before it reaches us.
  • Without it, that radiation would harm skin, eyes and crops .
part 2 - 3.3.2 Stratosphere - Concepts - Chapter 3 - Atmosphere and Climate - Understanding Society India and Beyond Class 9
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