Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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Special Features of Polar Meteorology<br />
• During the winter polar night, sunlight does not reach the<br />
south pole.<br />
• A strong circumpolar wind develops in the middle to lower<br />
stratosphere; These strong winds are known as the 'polar<br />
vortex'.<br />
• In the winter and early spring, the polar vortex is<br />
extremely stable, sealing off air in the vortex from that<br />
outside.<br />
• The exceptional stability of the vortex in Antarctic is the<br />
result of the almost symmetric distribution of ocean<br />
around Antarctica.<br />
• The air within the polar vortex can get very cold.<br />
• Once the air temperature gets to below about -80C (193K),<br />
Polar <strong>Stratospheric</strong> Clouds (or PSCs for short) are formed.