Definition of Stratosphere
The stratosphere is the second layer present in the atmosphere. It is present above the troposphere and below the mesosphere. The layer that discriminates between stratosphere and troposphere is called tropopause whereas the layer which separates stratosphere and mesosphere is called stratopause. The temperature of the stratosphere increases as altitude increases.
This is due to the presence of ozone in this region that absorbs ultraviolet radiation from the sun. There are very few water vapours in this layer and hence the air is usually dry. Air is very light at the top of the stratosphere and if any material gets into this region, it is confined there for a long period. The damage that is being done to the ozone layer by CFCs and volcanic eruptions is just because of this lack of vertical convection.