European satellite system Copernicus has discovered that the largest hole in the ozone layer over the Arctic has finally closed. Earlier in March, scientists had observed a hole forming in the layer and reasoned it as the result of dropping temperatures at the north pole. On April 23, however, it was discovered by Copernicus that the hole had closed itself.
According to scientists, this did not happen because of low pollution levels due to the coronavirus lockdown across the world. Instead, it was because of the polar vertex. This is the high-altitude currents that bring cold air into the polar region. In recent days the vertex has broken and weakened letting warm air inside.
Source: Samaa
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