Poster Total Ozone Trends at Northern High Latitudes from Ground-based measurements Bernet, Leonie; Dahlback, Arne; Goutail, Florence; Hansen, Georg H.; Orsolini, Yvan Joseph; Pazminño, Andrea; Svendby, Tove Publication details Event: Quadrenial Ozone Symposium 2021 (Online) Date: October 3rd 2021 – October 9th 2021