The Ozone Layer Is Disappearing

Use the bathtub analogy to describe how the steady state concentration of stratospheric ozone could be maintained. Also use the bathtub analogy to describe how anthropogenic influences might perturb the steady state concentration of ozone in the stratosphere. 

It is known that measured ozone concentrations are lower than can be accounted for by the simple Chapman cycle. This has led scientists to look for other influences on the concentration of ozone. First, let s briefly consider one of the natural reactions that destroys ozone. UV radiation can break the oxygen-hydrogen bond of a water molecule in the stratosphere to generate hydrogen atoms and hydroxyl radicals ( OH). These two species are involved in many reactions, some of which actually convert Og to Og. However, this process, which scientists now believe is an efficient process above 50 km, has been occurring since the ozone layer developed, and there is little, if anything, that humans can do about it. The system has obviously attained a steady state that includes this perturbation. 

Reaction sequence for ozone destruction promoted by nitric oxide. 

What percentage of radiation coming from the Sun is ultraviolet 

Write out the reactions of the Chapman cycle and discuss the meaning of each. 

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