Stratospheric chemistry of ozone

The chemistry of ozone depletion is driven by energy associated with sunlight. Accordingly, we will start the consideration of stratospheric chemistry of ozone by 

The spectrum of solar light that is considered from a biological point of view can be divided in ultraviolet range (wavelength, k 280 nm is known as UV-C, 280-320, UV-B, and 320, UV-C), visible range, 400-750 nm (from violet to red light) and infrared ( 750 nm). 

Under the influence of sunlight, oxygen (O2) is continuaUy being changed into ozone 

The principal reactions in the photochemical process of formation and destruction of ozone are reactions (l)-(4), collectively known as the Chapman mechanisms 

Reactions (1) and (2) represent ozone formation, while (3) and (4) are the reverse process. Oxygen atom (0) is very reactive, and consequently has a short lifetime in the stratosphere. Sunlight drives both ozone formation and destruction and this means that all four reactions will halt at sunset, and so during the nighttime the(03 is essentially the same as at the end of the day. 

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Characterize light absorption by molecules and its role in stratospheric chemistry of ozone and other reactants. 

Discuss the role of nitrous oxides in stratospheric chemistry of ozone. Discuss the relative importance of this species in ozone destruction. 

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