Ozone: Formation, Depletion and Montreal Protocol (Examrace - Dr. Manishika)

In this lecture Dr. Manishika Jain explains the importance of Ozone, its formation and depletion & pros and cons of 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 ratified
Copenhagen Amendment (1992) – 176 nations
Vienna Amendment (1995)
Montreal Amendment (1997) - 152 nations
Beijing Amendment (1999) -124 nations


Ozone – Oxygen Cycle @0:43
Ozone @4:41
Ozone Destruction @5:51
Stratospheric Halogen Gases @9:34
Montreal Protocol @10:26
5 Amendments @13:02
#Stratospheric #Ozone #Destruction #Biologically #Filtered #Wrinkling #Penetrate #Discovered #Depletion #Protocol #Manishika #Examrace

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0:00 Introduction
0:44 Ozone-Oxygen Cycle
5:52 Ozone Destruction
10:27 Montreal Protocol
13:02 5 Amendments #examrace #upsc #ugcnet