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An ozone hole over Antarctica appears every autumn, but then delayed.
An expert in the ozone layer, head of the Arctic and Antarctic Research Laboratory RIA Novosti reported
Earlier, the European Space Agency reported the disappearance of the ozone hole over the Antarctic. These data were received by the European spacecraft Sentinel-5P during the study of the planet's atmosphere in November 2017. The report adds an image that the ozone hole covering half from Antarctica was delayed until November 26, 2017.
"From November to May, there are no ozone holes on the Antarctic", Radionov explains. He pointed out that during the period of the polar night, which continues in the southern hemisphere when in Russia in the summer, the measurements are not carried out, the data on the content of ozone in the & nuit, l l l,,,,,,,,,,, atmosphere right now are missing. The "hole" emerges at the end of the year
The ozone hole on the Antarctic is still ongoing in each Antarctic spring (September – November), until that time. that the stratospheric vortex on the Antarctic is not destroyed. It blocks the arrival of air masses in the stratosphere of northern regions with high ozone content. Very low temperatures inside this vortex – minus minus 78 degrees Celsius – contribute to that ozone at 15-30 kilometers of altitude collapses much faster chlorine and bromine compounds , which naturally forms under the influence of ultraviolet radiation from the Sun. According to data provided by him, Russian scientists at the Novolazarovsky station have been conducting measurements of the ozone layer since 1986. Meanwhile, including the Arctic expeditions of 2014-15, 2015-16 and 2016-17 , between September and November, a sinusoidal sinking of the ozone layer at values below 200 Dobson units (scale of atmospheric ozone measurements) was recorded
. The ozone hole on Antarctica is one of the major threats to the global ecosystem, since the Earth is defenseless without harming the Sun's ultraviolet rays.
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