Scientists have announced the resumption of a steady decline in ozone-depleting CFC (chlorofluorocarbons) gases. CFC gases released into the atmosphere through perfumes, air conditioners, refrigerators and exhaust fumes react with ozone and cause the ozone layer to break down.
However, atmospheric measurements published in 2018 showed that CFCs were produced illegally in East China. However, recent research has shown that production has stopped and the ozone layer improvement process has resumed.
OZONE FOLDING LIFE
The ozone layer absorbs most of the ultraviolet radiation from the Sun and is located in the upper atmosphere. Damage to the layer means that more ultraviolet radiation can reach the earth and harm humans and other living things. Ultraviolet rays, which are very dangerous, can damage the DNA of living things or cause deadly diseases such as skin cancer.
On the other hand, the role of CFCs in ozone depletion has been known since the 1980s. The findings, based on several years of research by an international research team, were published in two separate articles in the journal Nature.
In the first article, it was revealed that global trichlorofluoromethane (CFC-11) emissions, a type of CFC, decreased in 2019 in proportion to the global ban on CFC production. An international clause prohibiting the production of CFCs was added to the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer. The agreement will be signed in Turkey, including about 200 countries.
THE ANALYSIS STOPPED IN 2018
Atmospheric scientist Dr. Bristol University made a statement on the subject. “Things were going as planned,” Luke Western said. However, a study conducted in 2018 revealed that the concentration of CFCs in the atmosphere did not fall as much as we expected. We wanted to know what happened. “My research has shown that additional CFC-1s come mainly from East China,” he said.
Dr. Western and his colleagues used data from air monitoring stations in South Korea and Japan as part of their research. The results showed that CFCs are used in most of the polyurethane insulation foam produced by companies in the region.
However, Western said that with the addition of the substance to the Montreal Protocol in 2019, emissions have returned to unprecedented levels since 2013. Restoration of the ozone layer is now “on the way”, Western said he hopes the ozone layer will return to the levels seen in the 1980s by the end of this century.