In Antarctica, the ozone hole has reached its biggest form till now compared to the previous years according to the Copernicus Atmosphere Monitoring Service (CAMS).
Also check NASA’s watch status of the ozone layer over Antarctica.
Every year researchers are seeing ozone hole formation over Antarctica is increasing as it an annual process that takes place due to the climatic change and it shows up in the southern hemisphere in September and October being the end of winter.
It is even stated that the 2019 ozone hole was smaller than the one formed in 2020 as 2019 was much warmer than 2020. Climatic conditions and various atmospheric acts are the reason for the increase in the ozone hole expansion.
Polar Vortex has also affected the growth of the ozone hole in the current year as the temperature in the polar vortex is about -112°F (-80°C). Researchers believe that the hole in the ozone layer is assembled in the frosty Polar Vortex together with dormant chlorine and bromine. They become active chemically when the sunlight comes back after winter diminishing the ozone layer.
Vincent-Henri Peuch has said that “There is much variability in how far ozone hole events develop each year. The 2020 ozone hole resembles the one from 2018, which also was a quite large hole, and is definitely in the upper part of the pack of the last fifteen years or so. He further added to “continue enforcing the Montreal Protocol banning emissions of ozone-depleting chemicals.”
The formation of the ozone hole is associated mainly with the temperature in the stratosphere. Stratospheric clouds which cause chemical damage to the ozone layer forms only below -78 degree celsius. These clouds contain crystals of ice which convert non-reactive compounds to reactive compounds that can swiftly damage ozone as the sunlight is accessible to kick off the chemical reactions. So, Polar stratospheric clouds and solar radiation becomes the main logic that the ozone hole is observed in the late winter and early spring.
The ozone layer is an armor that saves the earth’s atmosphere absorbing nearly 97 to 99% of ultraviolet light and radiation from the sun. So, without the ozone layer, our earth would have been baked and life on earth would have been damaged completely or have not existed.
So our survival depends on the ozone layer and the ozone hole should be decreased with time to maintain the stability of life on earth. NASA has set a recovery process for the Earth’s protective ozone layer which would keep us safe and decrease the ozone hole gradually.
Source – CAMS