Almost in the Arctic Ozone hole

Ozone continues to thin out, almost hollow in the Arctic. Stratospheric temperature decline is a cause.

The cause of the formation of the ozone hole is three, according to Professor Ross Salawitch, chemist and biochemist from the University of Maryland, who studied the chemical substances in the atmosphere. All three are sunlight, halogen, and low temperatures.

When the temperature drops exceeding the threshold, the clouds formed in the stratosphere. Halogen, in particular pollutants, such as chlorine and bromine, turned into chemical compounds that react quickly in the ozone. "Everything was changing drastically," says Salawitch.

This year the polar wind system known as the "polar vortex" very calm

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