the temperature of upper stratosphere is high than lower stratosphere because it is near to sun in compression of lower stratosphere and ozone layer active in lower stratosphere.
Ozone is produced naturally in the stratosphere when highly energetic solar radiation breaks down molecules of oxygen - O2 - and cause the two oxygen atoms to split apart in a process called photolysis. ... The stratosphere is very dry; air there contains little water vapor. That's why the Ozone layer stabilizes there.
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