Ozone destruction by halogenated species

Natural chlorine in the stratosphere is mainly transferred there as methyl chloride (CH3C1), which probably comes from marine and terrestrial biological 

These reactions produce the free chlorine catalytic manner, i.e. atoms that react with 03 in the 

However, CIO produced on reaction with 03 may not always react with atomic oxygen (eqn. 3.46), but can interact with nitrogen compounds instead  

This reaction is of considerable importance because it effectively removes the nitrogen and chlorine species involved in the cycles that destroy 03. If, however, there are solid surfaces present, the chlorine sequestered in this reaction can be released  

The reaction sequence (eqns. 3.49-3.54) is particularly fast at low temperature. Moreover, the square dependence on chlorine concentration implicit within equation 3.50 makes the reaction very sensitive to chlorine concentration. It is these low-temperature processes on particle surfaces that offer the best explana- 

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