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the stratosphere

noun [S]
 
 
/ˈstræt.ə.sfɪər/ US  /ˈstræ.t̬ə.sfɪr/

Definition

the layer of gases surrounding the Earth at a height of between 15 and 50 kilometres that is not affected by the weather and in which the temperature increases with height: During the 1980s, the amount of ozone in the stratosphere above Europe decreased by about eight percent. → Compare the ionosphereThe Earth and outer space - general words
(Definition of the stratosphere noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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