Stratosphere. The stratosphere is the second major strata of air in the atmosphere. It extends above the tropopause to an altitude of about 30 miles (50 km) above the planet’s surface. The air temperature in the stratosphere remains relatively constant up to an altitude of 15 miles (25 km).

What is the use of stratosphere?

The stratosphere is where you’ll find the very important ozone layer. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun.

Considering this, what is the composition of the stratosphere?

Between 85 and 90% of all the ozone in the atmosphere is found in the stratosphere. Ozone is formed when sunlight breaks down molecular oxygen (O2) in the stratosphere into oxygen atoms (O).

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What are the main characteristics of the stratosphere?

Stratosphere – Definition and Characteristics

  • Height. It extends up to a height of 10 to 50 km.
  • Temperature Inversion. The lower layers of the stratosphere are colder & as we move upwards, the upper layers become hotter.
  • Calm & stable layer.
  • Suitable for flying aircraft.
  • The flow of jet streams.
  • Region of ozone formation.
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Is there gravity in the stratosphere?

In the stratosphere, gravity waves help drive the atmospheric circulation and move ozone from the tropics to the poles. Observations such as these at multiple heights in the atmosphere provide a unique perspective on how atmospheric layers are linked together.

How much oxygen is in the air?

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

What layer contains the ozone layer?


Hereof, what is the structure of the atmosphere?

The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.

What is the coldest layer of the atmosphere?


What are the 7 layers of atmosphere?

The 7 Layers the Earth’s Atmosphere

  • Exosphere.
  • Ionosphere.
  • Thermosphere.
  • Mesosphere.
  • Ozone Layer.
  • Stratosphere.
  • Troposphere.
  • Earth’s Surface.

How thick is our atmosphere?

Earth’s atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface. Air pressure decreases with altitude. At sea level, air pressure is about 14.7 pounds per square inch (1 kilogram per square centimeter).

In which layer of the atmosphere do humans live?


What gases are in the stratosphere?

The Stratosphere extends from the tropopause up to 31 miles above the Earth’s surface. This layer holds 19 percent of the atmosphere’s gases and but very little water vapor. Temperature increases with height as radiation is increasingly absorbed by oxygen molecules which leads to the formation of Ozone.

What is the hottest layer of the atmosphere?


Is the stratosphere hot or cold?

Warm air rises and cool air sinks and so the troposphere is unstable. In the stratosphere, temperature increases with altitude. The stratosphere contains the ozone layer, which protects the planet from the Sun’s harmful UV. The higher layers contain few gas molecules and are very cold.

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Why do planes fly in the stratosphere?

The main reason airplanes fly in the stratosphere is because this is where the least amount of turbulence is found. In addition, because the stratosphere is very dry, there are fewer clouds in this layer, making for a much smoother ride overall.

What are 5 facts about the stratosphere?

The stratosphere contains approximately 19% of the earth’s total atmospheric gases. 90% of the ozone layer is found in the stratosphere’s upper crust. This ozone layer is important for man’s survival, and for the survival of life on earth, as it absorbs the UV radiation from the sun that would otherwise be deadly.

How thick is the troposphere?

The thickness of the troposphere varies from about 7 to 8 km (5 mi) at the poles to about 16 to 18 km (10 to 11 mi) at the Equator. In addition, it varies in height according to season, being thinner in winter when the air is densest.

Can you breathe in the stratosphere?

The stratosphere is between 8 and 30 miles above the ground – too far away for you to breathe any of its air! The ozone in this layer of air protects plants, animals, and us by blocking the most harmful rays of the sun.

Likewise, what is the pressure of the stratosphere?

This region of increasing temperatures is the stratosphere, spanning a pressure range from 100 millibars at its base to about 10 millibars at the stratopause, the top of the layer.

What is the importance of stratosphere?

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.