Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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PSCs promote the conversion of inorganic Cl<br />
and Cl reservoir species to active Cl<br />
Pathway 1 : HCl(g) Cl2 (g)<br />
• Absorption of gaseous HCl by PSCs occurs very<br />
efficiently<br />
HCl(g) HCl(s)<br />
• Heterogeneous reaction of gaseous ClONO2 with HCl<br />
on the PSC particles<br />
HCl(s) + ClONO2 HNO3 (s) + Cl2 where s denotes the PSC surface<br />
Note: The gas phase reaction between HCl and ClONO 2 is<br />
extremely slow.