Beijing, April 6 / Xinhuanet / — A record drop in the concentration of ozone in the atmosphere over the Arctic and the migration of poor ozone air masses to the south will lead to higher levels of UV radiation in Scandinavia, and, at times, in central Europe and in Russia, said Dr. Markus Rex of the German Institute for Polar and Marine Research, Alfred Wegener Institute (AWI).
The layer of ozone (a gas consisting of three-atom oxygen molecules), located in the stratosphere absorbs most of the harmful organisms to ultraviolet radiation. Ozone is destroyed, including those under the influence of chlorofluorocarbons (or CFCs) — substances that are currently prohibited international Montreal Convention.
This winter because of low temperatures in the stratosphere, which contributes to the "activity" of CFCs, ozone levels in the Arctic fell by 40% — a record value on record.
"Such significant ozone loss has never occurred in the northern hemisphere, which is densely populated even at high latitudes," — said Rex, speaking at a conference of the World Meteorological Organization in Vienna.
Because of the relatively low position of the sun above the horizon in the polar latitudes, the impact of ultraviolet radiation in these regions should not be a concern for human health. However, if ozone-depleted air masses will drift south towards central Europe, Canada, the U.S. and Russia, the inhabitants of these regions are even in April for a few minutes to get sunburns increase the risk of skin cancer.
"If the level of UV radiation increases, it may take several days, and protection from the sun may be needed at this time, especially for children," — said Rex.
However, the intensity of UV radiation does not exceed the value of the tropics.
However, the use of protective equipment against UV can rest easy for healthy people in the street, even in times of reducing the concentration of ozone. At the same time, people living in northern latitudes, and suffering from a lack of vitamin D, may be more vulnerable in this regard.