Ozone: Formation, Depletion and Montreal Protocol YouTube Lecture Handouts
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Ozone: Formation, Depletion and Montreal Protocol
Ozone-Oxygen Cycle
Ozone
- 15 - 30 km
- UV-C: Short λ, Most Damaging, Totally filtered by atm.
- UV-B: Medium λ, Biologically Active, Tanning
- UV-A: Long λ, 95% of UV, Penetrate deeper layers, ageing and wrinkling, skin cancers
- Ozone layer: By French physicists Charles Fabry and Henri Buisson in 1913
- Ozone hole: Antarctica every spring (discovered by Joseph Farman, Brian Gardiner, & Jonathan Shanklin of British Antarctic Survey in 1985) .
Ozone Destruction
Montreal Protocol
Vienna Convention for Protection of Ozone Layer (1985) : Protect health
Montreal Protocol on Substances That Deplete the Ozone Layer: Signed in 1987 & effective 1989.
5 Amendments
- London Amendment (1990) – 185 nations
- Copenhagen Amendment (1992) – 176
- Vienna Amendment (1995) -
- Montreal Amendment (1997) - 152
- Beijing Amendment (1999) -124 nations
✍ Manishika