Articles | Volume 15, issue 8
Research article
23 Apr 2015
Research article |  | 23 Apr 2015

The decrease in mid-stratospheric tropical ozone since 1991

G. E. Nedoluha, D. E. Siskind, A. Lambert, and C. Boone


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Short summary
While global stratospheric O3 has begun to recover, there are localized regions where O3 has decreased since 1991. O3 in the mid-stratosphere is very sensitive to nitrogen chemistry, with increased NOy resulting in decreased O3. We show how the observed O3 changes in the tropical mid-stratosphere can be caused by long-term variations in dynamics. These variations result in a decrease in N2O, an increase in NOy, and a resulting decrease in O3.
Final-revised paper