According to researchers, the Ozone Layer’s ‘hole’ is finally healing after decades of chemicals penetrating and ‘thinning out’ the protective layer blocking out ultraviolet radiation.
As the world warms, CFCs and extreme cold in Antarctica that once destroyed the Ozone layer is helping it heal.
Professor Susan Solomon first showed the declining situation of the Ozone Layer in 1986. She proved that molecules containing bromine and chlorine from chloroflourocarbons or CFCs from aerosols, refrigerators and air-conditioning units are damaging the protective layer.
Decades further, the Montreal Protocol’s ban on CFCs have taken effect. Professor Solomon and her colleagues had carried out detailed measurements to the amount of ozone in the stratosphere between 2000 and 2015.
Information from weather balloons, satellites and model simulations showed the layer had begun to thicken with the reduction of atmospheric chlorine.
“Even though we phased out the production of CFCs in all countries including India and China around the year 2000, there’s still a lot of chlorine left in the atmosphere,” Prof Solomon said.
“It has a lifetime of about 50-100 years, so it is starting to slowly decay and the ozone will slowly recover.
“We don’t expect to see a complete recovery until about 2050 or 2060 but we are starting to see that in September the ozone hole is not as bad as it used to be.”