مصادر عالمية / Interesting Engineering

Ozone Hole Is The Largest, Deepest Ever This Year

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As alarming as it sounds, the ozone hole over Antarctica has reached its largest and deepest form yet, compared to previous years, according to the report by the European Union's Copernicus Atmosphere Monitoring Service (CAMS).

The forming of the ozone hole, which was first observed around the 1970s, is a phenomenon caused by ozone depletion due to climate change. It annually takes place over Antarctica and appears in September and October, following the end of winter in the Southern Hemisphere.

Researchers have been closely studying its size year by year. 

SEE ALSO: WHAT IS HAPPENING TO OUR THREATENED OZONE LAYER?

The ozone hole is now twice the size of the United States

As 2019 was warmer compared to 2020, last year's ozone hole was considerably smaller compared to 2020. The weather conditions and specific atmospheric events play an important role in the ozone hole's growth. This year’s ozone hole is also thought to have been affected by the Polar Vortex, where the temperature is around -112°F (-80°C).  

Ozone Hole Is The Largest, Deepest Ever This Year
Ozone layer analysis on July 12th, 2020. Source: CAMS

According to the experts, the hole in the ozone layer is formed within the freezing Polar Vortex along with inactive chlorine and bromine. These substances, however, become chemically active when struck with sunlight when the Sun rises after the long winter, depleting the ozone layer. 

Ozone Hole Is The Largest, Deepest Ever This Year
Ozone layer analysis on September 26th, 2020. Source: CAMS

Banning emissions of ozone-depleting chemicals

Following the alarming reports, director of CAMS, Vincent-Henri Peuch said, "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," and added that we should "continue enforcing the Montreal Protocol banning emissions of ozone-depleting chemicals," per Independent

Ozone Hole Is The Largest, Deepest Ever This Year
Ozone hole area growth chart by year. Source: CAMS

The ozone layer is an ozone shield covering the Earth against ultraviolet light and radiation, just outside the Stratosphere. It helps absorb around 97-99% of the ultraviolet light and radiation.

Without the ozone layer, the ultraviolet light and radiation from the Sun would scorch our planet, irreversibly damaging the life on Earth. (And we're not even mentioning the increase in skin cancer cases.) 

Watch the video below for an illustration of the ozone hole in 2020:

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