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Article Information
Category: Weather Weather
Content source: SKYbrary About SKYbrary
Content control: SKYbrary About SKYbrary
Tag(s) Atmosphere


The layer of atmosphere extending from the Tropopause, approximately 11 km above sea level, to about 50 km above sea level is known as the Stratosphere.


The Stratosphere is characterised by a temperature which is steady or increases with height. Towards the top of the layer, the average temperature is only a little below 0°C. The relatively high temperatures in this region of the atmosphere is due to the presence of small quantities of Ozone.

Flight Safety Issues

Generally, flights conducted in the Stratosphere will not encounter weather except where particularly vigorous thunderstorms extend above the Tropopause. Other flight safety issues associated with flight in the Stratosphere include:

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