Articles | Volume 15, issue 8
Atmos. Chem. Phys., 15, 4215–4224, 2015
https://doi.org/10.5194/acp-15-4215-2015

Special issue: Changes in the vertical distribution of ozone – the SI2N report...

Atmos. Chem. Phys., 15, 4215–4224, 2015
https://doi.org/10.5194/acp-15-4215-2015

Research article 23 Apr 2015

Research article | 23 Apr 2015

The decrease in mid-stratospheric tropical ozone since 1991

G. E. Nedoluha et al.

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AR by Gerald Nedoluha on behalf of the Authors (24 Mar 2015)  Author's response    Manuscript
ED: Publish as is (03 Apr 2015) by Mark Weber
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.
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