Ozone Depletion
- 1. OZONE DEPLETION Avinash Darsimbe Asst. Professor Department of Botany Shri Shivaji Science College, Amravati (MS), India
- 2. Contents : Introduction Earth At Glance Hole In Ozone Scientific Studies Ozone Formation Ozone Depletion Consequences Montreal Protocol What Can We Do
- 3. Introduction The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.
- 5. The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above earth, though the thickness varies seasonally and geographically.
- 6. First Pictures of Earth From 100 Miles in Space, March 7 , 1947 by German V-2 rocket Launched by NASA
- 7. A picture of Earth , May 18, 1969 by Apollo 10 spacecraft during its trans-lunar journey toward the moon
- 8. Green Earth
- 9. Factors strat to affect the Earths environment Ozone depletion
- 10. Ozone Layer Formation Chapman cycle
- 13. Factors affecting ozone formation
- 14. Gasses of family - Nitrogen oxides Hydrogen oxides
- 15. . Gasses having,Bromine & Chlorine Mainly CFC (Chloroflorocarbon)
- 20. Meanwhile, TOMSt(Total Ozone Measuring Satellite) had been launched to observe ozone from above the Earth.
- 21. TOMS detected the developing ozone hole
- 22. TOMS detected the developing ozone hole
- 24. Declining OZONE CONCENTRATIONS (in Dobson units) (over Antarctica) 1957-1986 Early data from ground measurements of British survey team
- 25. Consequences
- 28. Montreal Protocol 191 Nations - 1987- Montreal, Canada 1st plan - reduce CFC production 50% by 2000 Montreal Protocol Phase Outs - 1. CFCs 2. Halons 3. Carbon tetrachloride 4. Methyl Chloroform 5. Methyl Bromide 6. HCFCs