September 28

August 16

August 12

September 1

September 7

18.4 km^2

22.4 km^2

18.4 million km^2

22.4 million km^2

The sun rises over the South Pole, causing the chlorine in the atmosphere to be chemically destroyed

UV radiation from the Sun generates more new ozone than the ozone depleting chemistry destroys

The polar vortex breaks down, and the relatively rich ozone air to the north of the Antarctic area mixes in 

You need cold temperatures to have stratospheric clouds, chlorine from CFCs and UV radiation from the Sun.  These conditions only occur in Spring.

The conditions required are cold temperatures and a strong polar vortex, so the ozone hole occurs in the winter months of the Southern Hemisphere

Warm temperatures are necessary to facilitate the ozone destroying chemistry as this leads to a strong polar vortex which concentrates the ozone over the South Pole

Yes, ozone has been depleted since the mid 1980s, which clear coincides with an increase in skin cancer rates in Australia

No.  The Ozone hole was repaired when the Montreal treaty was signed in 1991, the most successful treaty ever signed by the World's governments

Yes, skins cancer rates are greater in the southern latitudes, so clearly proximity to Antarctica and the ozone hole are linked.

No - the ozone hole is mostly contained over Antarctica, and does not result in higher ozone concentrations over Australia

Yes, ozone has been depleted since the mid 1980s, which clear coincides with an increase in skin cancer rates in Australia

No.  The Ozone hole was repaired when the Montreal treaty was signed in 1991, the most successful treaty ever signed by the World's governments

Yes, skins cancer rates are greater in the southern latitudes, so clearly proximity to Antarctica and the ozone hole are linked.

No - the ozone hole is mostly contained over Antarctica, and does not result in higher ozone concentrations over Australia

The highest ozone concentrations are in the upper stratosphere, where the UV concentrations are also the highest

There is no ozone left in the atmosphere due to the ozone hole which destroyed it all.

Ozone is found in the highest concentrations in the troposphere, where is is generated from lightening strikes and internal combustion engines

The highest concentrations of ozone are found in the lower stratosphere, where most of the UVb and UVc are absorbed.

UVa

UVc

UVb