Articles | Volume 22, issue 24
Research article
15 Dec 2022
Research article |  | 15 Dec 2022

Driving mechanisms for the El Niño–Southern Oscillation impact on stratospheric ozone

Samuel Benito-Barca, Natalia Calvo, and Marta Abalos

Data sets

Japanese 55-year Reanalysis, Monthly Means and Variances. Research Data Archive at the National Center for Atmospheric Research Japan Meteorological Agency/Japan

MERRA-2 tavgM_2d_slv_Nx: 2d,Monthly mean,Time-Averaged,Single-Level, Assimilation, Single-Level Diagnostics V5.12.4 Global Modeling and Assimilation Office

Chemistry \& Climate Processes: Products, SWOOSH: Stratospheric Water and OzOne Satellite Homogenized data set CSL

Atmospheric Chemistry observations \& modeling NCAR

Short summary
The impact of different El Niño flavors (eastern (EP) and central (CP) Pacific El Niño) and La Niña on the stratospheric ozone is studied in a state-of-the-art chemistry–climate model. Ozone reduces in the tropics and increases in the extratropics when an EP El Niño event occurs, the opposite of La Niña. However, CP El Niño has no impact on extratropical ozone. These ozone variations are driven by changes in the stratospheric transport circulation, with an important contribution of mixing.
Final-revised paper