Atmospheric Layers

Layer Features
Troposphere
  • Extends from the Earth's surface to about 20 km of height.
  • The height of the troposphere varies from the equator to the poles increasing towards the equator.
  • The temperature in the troposphere decreases with height.
  • All weather phenomenon occurs in this region.
  • The transition boundary between the troposphere and the layer above is called the tropopause.
Stratosphere
  • Extends from the top of Troposphere to about 50 km above Earth's surface.
  • The temperature increases with height.
  • The ozone layer is found in the lower portion of the stratosphere.
  • The transition boundary between the stratosphere and the mesophere is called the stratopause.
Mesosphere
  • Extends from the top of Stratosphere to about 85 km above Earth's surface.
  • The temperature decreases with height.
  • Most of the meteors burn up in this layer.
  • The transition boundary between the mesophere and the thermosphere is called the mesopause.
Thermosphere
  • Extends from the top of Mesosphere to about 600 km above Earth's surface.
  • The temperature increases greatly with height reaching upto 2000° at the top of the layer.
  • The ionosphere is a layer within the thermosphere.
  • Auroras are formed in this layer.
Exosphere
  • Extends from the top of Thermosphere to about 10000 km above Earth's surface.
  • Satellites orbit the earth in this layer.