The characteristics and the importance of the stratosphere layer
The stratosphere layer
The stratosphere layer is the second layer of the atmospheric envelope , It is called the ozonic atmospheric envelope , The atmospheric pressure in the stratosphere layer decreases as we go up until it becomes 1 mb at its top ( 0.001 of the normal atmospheric pressure at the sea level ) .
The stratosphere layer extends from the tropopause ( at a height of 13 km above the sea level ) to the stratopause ( at a height of 50 km above the sea level ) , The thickness of the stratosphere is 37 kilometers .
The temperature in the stratosphere layer increases gradually from ( – 60 degree Celsius ) , at the lower part until it reaches ( 0 degree Celsius ) at the top of the layer .
The stratosphere layer contains the most of the ozone gas which found in the atmospheric envelope at the height 20 t0 40 km above the sea level . So , The stratosphere layer is called the ozonic atmospheric envelope .
The lower part of the stratosphere layer does not contain clouds or weather disturbances , and the air movement is horizontally . So the pilots prefer to fly their planes in the stratosphere layer .
So , the stratosphere layer is important for man’s life as it contains the ozone layer which absorbs the harmful ultraviolet radiations which emitted from the Sun , and also it is convenient for flying of the planes .