Articles | Volume 19, issue 2
Atmos. Chem. Phys., 19, 767–783, 2019
Atmos. Chem. Phys., 19, 767–783, 2019

Research article 22 Jan 2019

Research article | 22 Jan 2019

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

Evgenia Galytska et al.

Data sets

QBO equatorial winds at 10 and 30 hPa M. Kunze

Anomalies of the Nino 3.4 index NOAA

Bremen Composite Mg-II Index (10.1051/swsc/2014001) M. Weber

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 NOx, NOx, 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.
Final-revised paper