VIDEO: NASA shows how much the hole in the ozone layer has grown in Antarctica this 2021

Experts estimate that the ozone layer will fully recover in 2070.

Photo: Newsmakers / Getty Images

A video released by NASA in late October revealed that the hole in the ozone layer over the Antarctic reached 24.8 million square kilometers in 2021, a size similar to that of all of North America. Experts estimate that the layer will fully recover by 2070, according to calculations.

“This is a large ozone hole due to stratospheric conditions cooler than the 2021 average, And without a Montreal Protocol, it would have been much biggerPaul Newman, chief Earth science scientist at NASA‘s Goddard Space Flight Center, said in an official statement.

What people commonly call a “hole in the ozone layer” is actually a thinning of the ozone layer, which is caused mostly by chlorine and bromine, both chemicals made by humans that affect the stratosphere above. from Antarctica. Although the coat usually weakens in September.

While it is true that the hole is extensive, it is currently much better than in the 1990s and early 2000s. This is largely due to the Montreal Protocol, which prohibits the release of chemicals such as chlorofluorocarbons, which are the main causes of the weakening of the ozone layer.

According to Newman and several colleagues, Without the Montreal Protocol, the ozone layer would be much more depleted today and the hole would be more than 1 million square miles larger than its current size.. However, not all countries comply with the protocol, it is estimated that just over 50 nations prohibit the emission of chlorofluorocarbons into the atmosphere.

The Live Science portal indicates that initially scientists calculated that the layer would fully recover by 2060, but in recent years it has done so more slowly and, consequently, updated the forecast for 2070.

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