Ozone layer depletion over the Antarctica and Arctic zones is a frequent phenomenon, which occurs every year. Usually, the size of the “hole” in the Ozone layer above Antarctica is larger than that above the Arctic zones. The dimensions of the hole in the ozone layer above Antarctica is in the range of 25 million square kilometers, and it is less than 1 million square kilometers for the ozone layer above the Arctic zone.
The reason for the depletion of the Ozone layer above the Arctic and Antarctic zones is attributed to extreme weather conditions. The atypical cold temperature in the Stratosphere above planet earth causes a Polar Vortex, which is a whirlpool of icy winds. The Polar Vortex thus formed, displaces or locally depletes the Ozone layer. The pollution count increasing on Earth leads to atmospheric imbalance, which further deteriorates the health of the Ozone layer.
Such depletion of the Ozone layer over the Poles have happened several times in the past, and the holes also close back in some time, once the temperature reaches an equilibrium. But this time, the situation appears to be unusual, as reported by the European Space Agency (ESA). This year the hole in the Ozone layer above the Arctic zone is unusually larger than the usual size every year. This year the size of the hole above the Arctic zone is about 1 million square kilometers. Though the ESA scientists expect the hole to close by end of this month, they appear to be worried about the health of the planet.