How much of the total ozone column change occurs in the stratosphere?

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Presentation transcript:

How much of the total ozone column change occurs in the stratosphere?

Effect of aircraft NOx and H2O on O3 (ppbv). R1-NA. No aircraft aerosols

Effect of aircraft NOx and H2O on O3 (%). (R1-NA)/NA. No aircraft aerosols

Effect of aircraft aerosols on O3 (ppbv). After simulating 3 years S1-R1

Effect of aircraft aerosols on O3 (%). (S1-R1)/R1

Effect of removing background aerosols on O3 (ppmv) (S2-R1) No aircraft aerosols Gives more NOx, to increase O3 production below and loss above.

Effect of removing background aerosols on O3 (%) (S2-R1)/R1 No aircraft aerosols Gives more NOx, to increase O3 production below and loss above.

S1-NA S1-R1R1-NA

In percent: The effect on O3 is reduced from ~2% to ~0.6%. This is the effect of aerosols on the ozone, not the reduction in ozone loss! (Max value is ~10 -3 %)