LAYERS-OF-THE-ATMOSPHERE.pdf
- 3. TROPOSPHERE
- 5. TROPOSPHERE ◼ The prefix “TROPO” means CHANGE ◼ All weather changes takes place ◼ This layer is the closest to the Earth’s surface ◼ It is lowest at the poles where it is about 7-10km above the Earth’ surface
- 6. ◼ It contains 90% of the total gases. ◼ It is highest about 17-18km near the equator ◼ The troposphere’s temperature decreases with elevation. ◼ The part where we live. ◼ The layer in which aircraft fly is the troposphere. ◼ Boundary between the troposphere, and the stratosphere is called the tropopause
- 8. STRATOSPHERE ◼ (strato- simply means "layer" or "level" ◼ Extends from 10 km to 50 km above the ground ◼ This layer of air that extends to about 50 km from Earth’s surface. ◼ Stratosphere is most beneficial as it absorbs the Ultraviolet (UV) radiations from the Sun because of the presence of ozone in it
- 9. ◼ Temperature increases with altitude ◼ Almost no weather occurrence ◼ Many jet aircraft fly in the stratosphere because it is very stable. ❑Upper boundary is called stratopause
- 12. MESOSPHERE ◼ “Meso” middle ◼ The layer between 50 km and 80 km above the Earth’s surface ◼ Air in this layer is very thin and cold. ◼ Meteors or rock fragments burn up in the mesosphere. ◼ Temperature decreases as altitude increases. ◼ Gases in this layer absorb very little UV radiation.
- 15. THERMOSPHERE ◼ “Thermo” means heat ◼ This layer lies between 80 km and 110 km above the Earth. ◼ Space shuttles fly in this area and it is also where the auroras are found. ◼ Auroras are caused when the solar wind strikes gases in the atmosphere above the Poles.
- 17. ◼ reflects radio waves ◼ this layer helps in the long- distance communication as the electrically charged gas particles present in the Thermosphere reflect backs the radio waves from the Earth to space
- 19. EXOSPHERE •“Exo” means outside •It is the outermost layer of the atmosphere and extends up to 640 KM of height •The temperature of this layer is quite high and ranges between 300-degree celsius to 1650 degree celsius •As the height of the layer increases, it slowly merges into the interplanetary space •Satellites are stationed in this area, 500 km to 1000 km from Earth.