Ozone Layer

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Ozone Layer

  1. 1. Ozone O3
  2. 2. The Ozone Layer absorbs most of UV light from sun in stratosphere.
  3. 3. How ozone is formed UV or lightning splits an oxygen (O2) - these join other O2 to form O3
  4. 4. Ozone Eaters1. CFCs (Chlorofluorocarbons): CClF3qcoolants in refrig. & a.c.
  5. 5. Breaking apart CFCsqtakes10-20 yrs forCFC molecules toreach stratosphere
  6. 6. Breaking apart CFCsq1 Cl atom candestroy 100,000ozonemolecules!
  7. 7. The Ozone Holeozone thinning over Antarctica
  8. 8. Sept 2006
  9. 9. Sept 2007
  10. 10. Dec 2007
  11. 11. Solar Radiation Types1. UV-A – milding irritating2. UV-B – most harmful to organisms3. UV-C – deadly ; does not reach Earth’s surface
  12. 12. Effects of Ozone Thinning1. More UV light passes through, damaging DNA, causing mutations, skin cancer, cataracts.
  13. 13. Effects of Ozone Thinning2. UV-B – kill some species of plants and microbes
  14. 14. Effects of Ozone Thinning-Limiting factor for coral communities-Reduced productivity of aquatic ecosystems

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