Name the Lowest Layer of the Atmosphere

By Shivank Goel|Updated : September 6th, 2022

The lowest layer of the atmosphere is the troposphere. The troposphere extends upward to about 10 km from the ground level (above sea level). This layer acts as a blanket of gases surrounding the earth's surface. About 75- 80% of the atmospheric mass resides in the troposphere, including the clouds. Also, all the weather occurs within the lowest layer of the atmosphere.

Lowest Layer of the Atmosphere

There are five layers of the earth's atmosphere: the Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere. The topmost or the highest layer of the atmosphere among these layers is the exosphere, while the lowest is the troposphere. Here are a few details about the lowest layer of the atmosphere-

  • The troposphere extends to 10 km above sea level from the ground (earth's surface).
  • The topmost part of the troposphere is known as the tropopause, while the bottom of the lowest part of the layer is known as the boundary layer.
  • Almost 70 to 75% of the air (all gases) exists in the troposphere.
  • About 99%of of water vapours exist in this layer. Thus, most of the clouds are observed in the troposphere.
  • The air pressure is lowest at the bottom layer and gradually increases on moving upwards.
  • Because of low pressure, the air expands on moving from the troposphere towards the upper layers.
  • Since air expands on cooling, the atmosphere's upper layer is cooler than the troposphere. The troposphere is the warmest layer of the earth's atmosphere.

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FAQs

  • The troposphere is the lowest layer of the atmosphere. It contains most of the atmospheric masses and extends upto 10km from the earth’s surface from the sea level.

  • The lowest layer of the earth's atmosphere is the troposphere. The lowest part of the troposphere is called the boundary layer, while the topmost part of the troposphere is called the tropopause.

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