Abstract
Contrary to tropospheric CO2 whose oxygen isotopic composition follows a standard mass dependent relationship, i.e. 17O 0.5 18O, stratospheric CO2 is preferentially enriched in 17O, leading to a strikingly different relation: 17O 1.7 18O. It has been shown repeatedly that the isotope anomaly is inherited from O3 via photolytically produced
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