Over the past few days ozone-depleted air masses extended from the north pole to southern Scandinavia leading to higher than normal levels of ultraviolet UV radiation during sunny days in southern Finland. These air masses will move east over the next few days, covering parts of Russia and perhaps extend as far south as the Chinese/Russian border. Such excursions of ozone-depleted air may also occur over Central Europe and could reach as far south as the Mediterranean.
At an international press conference by the World Meteorological Organisation WMO in Vienna April 5, atmospheric researcher Dr. Markus Rex from Germany´s Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association AWI pointed out that the current situation in the Arctic ozone layer is unparalleled.
Follow here for futher reading: Record breaking ozone hole over the Arctic this spring driven by climate change | ClimateSignals.