its hole Ozon layer Became “unusually persistent” on Antarctica between 2020 and 2022Data from the Atmospheric Monitoring Service of the European Copernicus satellite system (CAMS) reveals that the shutdown was relatively large as well as taking longer than usual.
According to the same source, this behavior, which has been repeated over the past three years, is particularly important because different from that observed in the previous 40 years.
The ozone hole in Antarctica usually starts to open in spring (late September) in the southern hemisphere and starts to decrease during October and closes during November.
Again, CAMS data of the last three years show a different behaviorbecause currently it was bigger than usual during the month of November and completely closed by December.
Climate change may be the cause
According to CAMS director Vincent-Henri Peuch, although there are several factors that influence this behavior change, he emphasizes: the last three years have been marked by strong eddies and low temperaturesrepeatedly caused large, long-lasting ozone holes to form.
“There is a possible association with climate change, which tends to cool the stratosphere. However, Having three unusual ozone holes in a row is quite unexpected.. Without a doubt, it’s something we need to keep working on,” he added.
The closing date of the ozone hole in 2020 and 2021 is December 28 and December 23, respectively; and scientists expect this year’s deficit to close in the next few days.
The ozone holes over Antarctica, in addition to being exceptionally persistent, were also relatively large. It covers over 15 million square kilometers (a surface similar to the size of Antarctica) for most of November.
Again, Although these recent ozone holes are quite large, “there are continuous signs of improvement. ozone layer”, according to the same source.
Thanks to the implementation of the Montreal Protocol, concentrations of ozone-depleting substances (ODS) have been decreasing slowly but steadily since the late 1990s.
Within fifty years, their concentration in the stratosphere is expected to return to pre-Industrial Revolution levels, and the holes in the ozone layer will no longer exist, regardless of the conditions of the polar vortex and the temperature they indicate. Exited from CAMS.
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