The characteristics and the importance of the troposphere layer

The atmospheric envelope

The atmospheric envelope consists of four layers above the sea level which are the troposphere layer , the stratosphere layer , the mesosphere layer and the thermosphere layer .

There is a region between each successive layers . In these regions , the temperature remains constant , There is  the tropopause which is the region between the troposphere layer and the stratosphere layer .

There is the stratopause which is a region between the stratosphere layer and the mesosphere layer , There is the mesopause which is the region between the mesosphere layer and the thermosphere layer .

The characteristics and the importance of the troposphere layer

The troposphere layer

The troposphere layer contains 75 % of the atmospheric mass

The troposphere layer is the first layer of the atmospheric envelope . The troposphere layer means the disturbed layer , Because all the weather changes take place in it .

The troposphere layer extends for 13 km above the sea level to the tropopause . The thickness of the troposphere layer is 13 km , And it contains 99 % of the atmospheric water vapour which organizes the Earth’s temperature .

The temperature decreases with a rate ( 6.5  degree Celsius ) for each ( 1 km ) height until it reaches the lowest value of about ( – 60 degree Celsius ) at the tropopause .

The atmospheric pressure in the troposphere layer decreases as we go up until it becomes 100 mb at its top , It contains about 75 % of the mass of the atmospheric air . All the atmospheric phenomena such as rains , wind , clouds , ………take place in this layer .

The air movement in this layer is vertical where , the hot air currents move upwards , while the cold air currents move downwards .

The characteristics and the importance of the mesosphere layer

The characteristics and the importance of the thermosphere layer

The characteristics and the importance of the stratosphere layer

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