Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
Stratospheric Ozone Depletion
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Chlorine atom<br />
Sources:<br />
Photolysis of Cl-containing compounds in the stratosphere.<br />
CFCl3 + hv (185-210nm) CFCl .<br />
2 + Cl .<br />
CF2 Cl2 + hv (185-210nm) CF2 Cl . + Cl .<br />
Subsequent reactions of CFCl2 and CF2 Cl more Cl atoms<br />
The principal Cl-containing species are:<br />
CF2 Cl2 , CFCl3 , CFCl2 , CF2 Cl, CCl4 , CH3 CCl3 , CF2 HCl, CH3 Cl<br />
Sources for Cl-containing compounds (need to be long-<br />
lived in the troposphere)<br />
•Man-made: e.g. CFCs<br />
•Natural: e.g. methyl chloride from biomass burning.
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