The Ozone Story

1
The Ozone Story

• January 21 23, 2008

• Formation of the ozone layer
• Why We Care
• Ozone Threats CFCs
• Early warnings
• Building a scientific consensus
• Nature of Action
• Lessons learned from the ozone story

2
The Ozone Layer The Scientific Basis

• What is the Ozone Layer?
• How did it come about?
• How does it protect us?

3
Evolution of the Ozone Layer

• Early planet history
• no ozone present
• UV light directly hit
• planets surface
• Oceans provided only
• refuge from UV radiation

4
(No Transcript)
5
(No Transcript)
6
Oxygen in the Atmosphere



7
UV





8
Causes of Ozone destruction
Polar stratospheric clouds
Volcanic eruptions
9
Dynamic Equilibrium
creation of ozone
breakdown of ozone
10
(No Transcript)
11
Location of Stratosphere
12
Vertical Structure of Atmosphere
13

14
How do we know O3 concentrations?
15
(No Transcript)
16
How Does Ozone Protect Us?
17
Why Protect the Ozone Layer?Or Negative
consequences of increased UV radiation

• Human Health
• Ecological Health
• Economic Impacts

18
Skin Melanoma Incidence by State, 2004
Source CDC. 2007. United States Cancer
Statistics 2004 Incidence and Mortality.
19
(No Transcript)
20
(No Transcript)