Formation of singlet oxygen in the atmosphere

The direct formation of singlet oxygen, following the absorption of radiation of wavelength 12,690 A and 7619 A, according to 

A number of studies have suggested that singlet oxygen is involved in the ultraviolet photolysis of ozone [238, 357, 457]  

Ozone photolysis in the upper atmosphere is extremely rapid. Recent experiments [304, 689] have suggested that, in the presence of ground state molecular oxygen, the singlet production occurs mainly by the energy transfer process  

Murray et al. [440—443] have shown that the reactions of ozone with a wide variety of compounds yield adducts which decompose to singlet oxygen for example, reactions (199) and (200), p. 490. 

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