Layers of Atmosphere YouTube Lecture Handouts
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Layers of Atmosphere - 4 Layers in Thermal & 2 in Magneto-Electrical Structure
Layers of Atmosphere
This lecture focuses on the thermal and magneto-electrical layers of atmosphere which include troposphere, stratosphere, thermosphere, mesosphere, ionosphere, plasmasphere and magnetosphere. Dr. Manishika Jain tries to explain the two criterias for layers of atmosphere in a simple manner.
Troposphere
- Lowest layer of our atmosphere.
- Extends to about 10 km
- All weather
- Most clouds
- 99% of the water vapor
Stratosphere
- Extends from the top of the troposphere to 50 km.
- Ozone layer
- Stratosphere gets warmer the higher
- Commercial passenger jets fly in lower stratosphere,
- Jet streams flow near the border between the troposphere and the stratosphere.
Mesosphere
- Extends upward to a height of about 85 km.
- Most meteors burn up in the mesosphere.
- Coldest temperatures about -90° C found near the top of this layer.
- Far too thin to breathe
- Pressure at the bottom well below 1% atm
Thermosphere
- High-energy X-rays and UV radiation from the Sun absorbed
- Raising temperature to hundreds to thousands of degrees.
- Satellites might orbit within the thermosphere
- Energy coming from the Sun influence height and temperature.
- Top between 500 and 1,000 km.
- Temperatures from 500° C to 2,000° C.
- Northern Lights and Southern Lights
Exosphere
- Thermosphere uppermost layer of atmosphere
- Very, very, thin air
- No clear-cut upper boundary with space.
- Top of the exosphere between 100,000 km and 190,000 km
Ionosphere
- Not a distinct layer.
- High-energy radiation from the Sun knocked electrons loose from their parent atoms and molecules.
✍ Manishika