Articles | Volume 23, issue 18
Research article
26 Sep 2023
Research article |  | 26 Sep 2023

On the pattern of interannual polar vortex–ozone co-variability during northern hemispheric winter

Frederik Harzer, Hella Garny, Felix Ploeger, Harald Bönisch, Peter Hoor, and Thomas Birner

Data sets

Archive Catalogue ECMWF

Short summary
We study the statistical relation between year-by-year fluctuations in winter-mean ozone and the strength of the stratospheric polar vortex. In the latitude–pressure plane, regression analysis shows that anomalously weak polar vortex years are associated with three pronounced local ozone maxima over the polar cap relative to the winter climatology. These response maxima primarily reflect the non-trivial combination of different ozone transport processes with varying relative contributions.
Final-revised paper