With the continuous crusade against global warming and even protecting Mother Earth from destruction, NASA has recorded a smallest hole in Ozone Layer since 1988.
According to the NASA scientists report, in September 2017, the ozone hole over the Antarctic reached the smallest it has been at peak since 1988.
Scientists from the agency said that the good news was partially due to climate, the ozone layer also has international cooperation to thank for its recovery.
Ozone layer is playing vital role in our planet, for humanity per se, it protect us from the danger of so much UV rays/lights from the Sun, with the huge destruction way back in 1970s, countries around the globe has taken steps to protect and save ozone.
In 1987, 197 countries signed the Montreal Protocol, an international agreement to stop releasing chemicals that were eating away a hole in our planet’s ozone layer.
In a rare scientific triumph, the hole in the ozone layer has just about returned to the size it was at the time of the protocol’s signing: at its peak size in September, NASA reported that the hole was about 7.6 million square miles wide, the smallest it has been at peak since 1988.
Unfortunately, we may have solved one global problem with another, arguably bigger one.
NASA has recorded a warmer temperatures in the low pressure system that rotates above Antarctica, known as the Antarctic vortex, prevented many stratospheric clouds from forming; it’s within these clouds that the first steps that lead to ozone-destroying reactions occur.
In other words, we could have global warming to thank.
“Weather conditions over Antarctica were a bit weaker and led to warmer temperatures, which slowed down ozone loss,” said Paul A. Newman, chief Earth scientist at NASA’s Goddard Space Flight Center, to the Washington Post.
“It’s like hurricanes. Some years there are fewer hurricanes that come onshore…this is a year in which the weather conditions led to better ozone [formation],” Newman added.
The hole in the ozone layer was first clearly detected in 1984, by British Antarctic Survey scientists monitoring the atmosphere. After the team published their discovery in 1985, it spurred an international effort to reduce ozone-depleting compounds, specifically chlorofluorocarbons (CFCs) that were then commonly used as refrigerants.
Furthermore, when the sun’s rays hit the chemically active forms of chlorine and bromine that come from these compounds, they produce reactions that destroy ozone.
Also, Ozone layer is primarily responsible for filtering out dangerous ultraviolet radiation from the sun, closing this hole — and preventing new ones from forming — is certainly good news. What’s more, the story of how we got here could be informative in addressing climate change as well.
Going back to the hole’s healing, due to CFCs hang around in the atmosphere for decades, scientists estimate that it will take until 2070 for the hole to return to the size it was in 1980.
However, if this reduction hadn’t happened, NASA modelers estimate that by 2020 we would have seen 17% of global ozone destroyed, with holes above both the Arctic and Antarctic; by 2065, global ozone would have been almost entirely depleted.