Characteristics and Importance of thermosphere layer, Ionosphere layer & Exosphere layer

The thermosphere layer is called the thermal layer as it is the hottest layer of the atmospheric envelope. It is the fourth layer of the atmospheric envelope, The temperature of the thermosphere layer increases at a high rate as we go up until it reaches 1200° Celsius.

The thermosphere layer

The thermosphere layer extends from the mesopause (at a height of 85 km above the sea level) to a height of 675 km above the sea level, Its thickness is 590 kilometres. The upper part of the thermosphere layer contains charged ions and the pressure of these ions extends up to 700 km above the sea level, So this part is called the ionosphere.

The thermosphere layer is the layer of the Earth’s atmosphere directly above the mesosphere and below the exosphere, within this layer of the atmosphere, ultraviolet radiation causes the photoionization/photodissociation of molecules, creating ions in the ionosphere.

Thermosphere layer

Thermosphere layer is called the thermal layer

The thermosphere layer begins at about 85 km above sea level, At these high altitudes, the residual atmospheric gases sort into strata according to molecular mass, Thermospheric temperatures increase with altitude due to the absorption of highly energetic solar radiation.

Temperatures are highly dependent on solar activity and can rise to 1,700 °C or more, Radiation causes the atmosphere particles in this layer to become electrically charged (see ionosphere), which enables radio waves to be refracted and thus be received beyond the horizon.

Dynamics of the thermosphere are dominated by the atmospheric tides, which are driven by the very significant diurnal heating, The Atmospheric waves dissipate above this level because of collisions between the neutral gas and the ionospheric plasma.

The thermosphere layer contains an appreciable concentration of elemental sodium located in a 10-km thick band that occurs at the edge of the mesosphere, 80 to 100 km above Earth’s surface. The last layer of the atmospheric envelope is called the thermal layer because it is the hottest layer in the atmospheric envelope.

The ionosphere layer

The ionosphere layer is a layer that contains charged ions, and it has an important role in wireless communications and broadcasting as it reflects the radio waves that transmitted by the radio stations and the communication centres.

The ionosphere layer is surrounded by two magnetic belts which are known as Van- Allen belts. These belts play an important role in the scattering of the harmful charged cosmic radiations away from the Earth. This scattering causes the occurrence of the Aurora phenomenon, Van- Allen belts are called by this name related to the scientist Van-Allen who discovered them.

Van-Allen belts

Van-Allen Belts play are two magnetic belts surrounding the ionosphere layer

Van- Allen belts play an important role in protecting the Earth because they play an important role in scattering the harmful charged cosmic radiations away from the Earth.

Aurora phenomenon

The Aurora phenomenon appears as brightly coloured light curtains seen from both poles (the North and the South Poles) of the Earth.

The occurrence of the aurora phenomenon is due to the scattering of harmful charged cosmic radiations away from the Earth by Van-Allen belts.


Aurora phenomenon

Exosphere layer

The atmospheric envelope is inserted with the outer space in a region known as the Exosphere, in which the satellites orbit around the Earth with cameras and a telescope, The satellites are used to transmit weather condition information and TV programs.

You can download Science online application on google play from this link: Science online Apps on Google play

Atmospheric layers & pressure, Troposphere, Stratosphere, Mesosphere & Thermosphere

The characteristics and the importance of the mesosphere layer

The characteristics and the importance of the troposphere layer

The characteristics and the importance of the stratosphere layer

You may also like...

9 Responses

  1. Anushka Shukla says:

    Thanks u so much.

  2. Beastkiller says:

    this is really cool!!!!

  3. Boaz Omondi says:

    This is very encouraging research. Thanks a lot.

  4. Joseph Stalin says:

    Hello, Thank you

Leave a Reply