Dynamically controlled ozone decline in the tropical mid-stratosphere observed by SCIAMACHY

Galytska, Evgenia; Rozanov, Alexey; Chipperfield, Martyn P.; Dhomse, Sandip. S.; Weber, Mark; Arosio, Carlo; Feng, Wuhu; Burrows, John P.

doi:https://doi.org/10.5194/acp-19-767-2019

Articles | Volume 19, issue 2

https://doi.org/10.5194/acp-19-767-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-767-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 2

Research article

|

22 Jan 2019

Research article |

| 22 Jan 2019

Dynamically controlled ozone decline in the tropical mid-stratosphere observed by SCIAMACHY

Evgenia Galytska, Alexey Rozanov, Martyn P. Chipperfield, Sandip. S. Dhomse, Mark Weber, Carlo Arosio, Wuhu Feng, and John P. Burrows

Supplement

https://doi.org/10.5194/acp-19-767-2019-supplement

Data sets

QBO equatorial winds at 10 and 30 hPa M. Kunze http://www.geo.fu-berlin.de/en/met/ag/strat/produkte/qbo/index.html

Anomalies of the Nino 3.4 index NOAA http://www.cpc.ncep.noaa.gov/data/indices/

Bremen Composite Mg-II Index (10.1051/swsc/2014001) M. Weber http://www.iup.uni-bremen.de/UVSAT/Datasets/mgii

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Short summary

In this study we analysed ozone changes in the tropical mid-stratosphere as observed by the SCIAMACHY instrument during 2004–2012. We used simulations from TOMCAT model with different chemical and dynamical forcings to reveal primary causes of ozone changes. We also considered measured NO₂ and modelled NO_x, NO_x, and N₂O data. With modelled AoA data we identified seasonal changes in the upwelling speed and explained how those changes affect N₂O chemistry which leads to observed ozone changes.