Aviation and the Global Atmosphere

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Figure 2-2: In the stratosphere, NOx both catalytically destroys ozone and acts to interfere with the destruction of ozone by reactions of HOx and halogens. Shown is a calculation of the rate of ozone loss in the lower stratosphere for springtime mid-latitude conditions during March. The loss from each family is illustrated. Ozone loss in the lowermost stratosphere is quite slow (a few percent per month). The right panel shows the effect on the removal rate of ozone when 20% more reactive nitrogen is added to the stratosphere uniformally (calculations provided by R. Salawitch using 1D-trajectory model).

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