The ozone layer |
Reports indicate that by the end of March, a large hole in the ozone layer above the North Pole had closed. The huge cracks in the ozone, which is about one million square kilometers, has disappeared. This comforting discovery was made by the European satellite system Copernicus.
The first ozone hole was discovered at the North Pole in January 2011. But it was small. The ozone layer protects the earth from the sun's ultraviolet radiation, which causes skin cancer. The big gap has closed in recent days.
But the hole has nothing to do with the lockdown that has been part of the fight against Kovid or the lack of air pollution. Instead, the ozone rupture and its changes are caused by the polar vortex phenomenon, which brings cold air to the polar region.
Most ozone depletion takes place where the air temperature drops below minus 42 degrees. This is why the ozone rupture first appears above the South Pole. The temperature at the South Pole is minus 62 degrees. However, the polar vortex phenomenon in the North Pole has led to a decrease in temperature and an ozone depletion.
Temperatures in the poles are typically about 20 degrees higher than when the polar vortex is experienced. This year, the Polar Vortex was so strong that it was getting colder. This led to strong ozone depletion. Ozone depletion is strongest when temperatures drop below minus 42 degrees. But over the past few days, the polar vortex has weakened and ozone depletion has been reduced.
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