Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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Polar vortex<br />
• The polar vortex is a persistent large-scale<br />
cyclonic circulation pattern in the middle and<br />
upper troposphere and the stratosphere,<br />
centered generally in the polar regions of<br />
each hemisphere.<br />
• The polar vortex is not a surface pattern. It<br />
tends to be well expressed at upper levels of<br />
the atmosphere (> 5 km).