The 2020 Arctic ozone depletion and signs of its effect on the ozone column at lower latitudes

The present study discusses the effect of ozone depletion that occurred over Arctic in 2020 on column central and southern Europe by analysing a data set obtained from ground-based measurements at six stations placed 79 to 42°N. Over northernmost site (Ny-Ålesund), decreased about 45% compared climatological average beginning April, its values returned normal levels end month. Southwards, anomaly gradually reduced nearly 15% 42°N (Rome) minimum was detected with delay 6 days 65°N 20 At same time, evolution considered below polar circle corresponded observed Ny-Ålesund, but 42°–46°N, turned back typical May. This similarity evolutional patterns different latitudes increasing occurrences towards south allows assumption columns lower were affected phenomenon Arctic. decrease Aosta (46°N) combined predominantly cloud-free conditions resulted an 18% increase erythemally weighted solar ultraviolet irradiance reaching Earth’s surface