Structure of the Stmosphere
- 1. Structure of the atmosphere
- 2. • We have learned the factors which influencing the temperature • From the earth surface upward there is a change in temperature, based on this change atmosphere has been divided into different layers
- 4. •Troposphere •Stratosphere •Mesosphere and •thermosphere
- 6. Troposphere • The atmospheric layer close to the earths surface is called Troposphere • The word Troposphere is derived from the Greek word tropos which means turn, air is very turbulent in this region • Based on the laltiude and season , its heights varies • At the poles it is 8 km and 17 km over equator. It is based on the temperature
- 8. • In the tropics convection current of air extends greater height , but in cold region it is very less • Temperature in Troposphere decreases steadily with increase in height, called normal lapse rate
- 11. • Extension of convectional current determine the height of troposphere • Temperature in Troposphere decreases steadily with increase in height at the rate of 1 degree per 165 mtr • All the weather like cloud, rain, thunder are taking place in Troposphere water vapour and dust particles are found only here. • above the Troposphere s the Tropopause, where temperature is steady
- 14. •Tropopause is the transitional zone between troposphere and stratosphere
- 15. stratosphere • It situates just above troposphere • In the lower part, temperature is constant • this means when height increases temperature will not increases . It is for about 30 km from the surface • Then up to 50 km temperature increases with increasing height • Ultraviolet rays of the sun absorb by oxygen molecules and split into oxygen atoms and forms ozone layers • Here temperature increases due to release of latent heat
- 16. • Jet planes that fly very height create a white line in the sky this because when planes fly in stratosphere. Steam they release condense and form it . since there is a less movement of air here , thus it visible for a long time • The transitional zone above stratosphere is called stratopause