How did ozone concentrations vary between the Northern hemisphere and the Southern hemisphere during 2008?

Exercise 1. The Montreal Protocol and its subsequent amendments
resulted in the elimination of many ozone depleting substances. A link to the
Montreal Protocol can be found on the course Webliography. Identify three other
“world” agreements or agencies committed to helping the world’s resources
(including plants, animals, and abiotic resources, such as gold and water).
Summarize (paraphrase) benefits gained in detail and include links
used.

 

Exercise 2. Since the implementation of the Montreal Protocol,
developed countries have decreased the amount of ozone destroying substances
they use tremendously. A link to the Montreal Protocol can be found on the
course Webliography. Reduction by the United States has been 97%. View the
following two animations. The first shows the ozone concentrations as they
varied from July to December 2008; the second animation shows average
concentrations of ozone over Antarctica during October — during the Southern
Hemisphere spring when the ozone hole typically is at its maximum extent. The
areas of least ozone are shown by blue and purple.

 

1. How did ozone concentrations vary between the Northern hemisphere and the
   Southern hemisphere during 2008?
2. Explain why the size of the ozone hole centered over Antarctica has
   increased over the past 30 years. What changes occurred since the implementation
   of the Montreal Protocol? What did the Australian Olympic Committee do to
   protect the athletes and visitors? (List at least 3 implementations at this time
   concerning radiation and ozone.)

 

Exercise 3. The KYOTO Protocol (The United States is not a signatory)
has established guidelines for the reduction of these six greenhouse gases:
carbon dioxide (CO₂), methane (CH₄), nitrous oxide
(N₂0), hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs), and
sulphur hexafluoride (SF₆).

Select three of these substances
and describe their chemistry in the atmosphere over a selected country/region
(your choice). Show a chemical reaction (formula) for all three; include a
written summary of biotic and abiotic changes possible in that country. Include
current references/links. Paraphrase or block a direct quote! Assume that your
country has implemented or will implement the Kyoto Protocol.