Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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Denitrification by PSCs enhances polar<br />
ClOx cycle<br />
• PSCs removes gaseous N species (denitrification)<br />
– Major process: formation of nitric acid trihydrate (NAT)<br />
PSCs<br />
– Minor process: Formation of HNO3 from gaseous N<br />
species (e.g. ClONO2 and N2 O5 ) and subsequent<br />
retention of HNO3 (s).<br />
– As PSCs particles grow larger over the winter, they sink<br />
to lower altitudes, falling out of the stratosphere.
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