10.26165/JUELICH-DATA/KET287 Grooß, Jens-Uwe(Forschungszentrum Jülich) Jülich DATA 2021 This data repository provides access to the model data of the study by Grooß and Müller submitted to JGR (2020). In this study, the unprecedented Arctic stratospheric ozone loss in the winter 2019/2020 is examined using simulations of the Chemical Lagrangian Model of the Stratosphere (CLaMS) and data from ACE-FTS, AURA-MLS and AURA-OMI. The data set contains model results for two simulations (REF, D25) described in the publication as well as the corresponding MLS satleeite data, evaluated in 3 dimensions, equivalent latitude, potential temperature and time Grooß, Jens-Uwe(Forschungszentrum Jülich)