According to the conclusions of the quadrennial report of the Scientific Committee of the Montreal Protocol issued Monday, November 5, the ozone layer, which refers to the region of the atmosphere where are largely filtered ultraviolet rays that come from the sun, s has been restored at a rate of 1 to 3% per decade since the year 2000, and could be fully cured in the next 40 years.
The study, titled “Science Assessment of Ozone Depletion: 2018,” is the latest in a series of four-yearly reports on the recovery of the ozone layer in the stratosphere.
In detail, the layer above the northern hemisphere and middle latitudes “should completely recover by 2030”, while it will be necessary to wait 2050 for the southern hemisphere, and 2060 for the polar regions.
The study shows that the concentration of ozone-depleting substances continues to decline, leading to an improvement in the layer since the previous assessment in 2014.
This phenomenon is largely explained by the success of the 1987 Montreal Protocol, which has “resulted in a long-term decrease in the atmospheric concentration of ozone-depleting substances (ODS)”. that the ongoing recovery of stratospheric ozone “.
The results are hailed as a demonstration of what global agreements can achieve and an inspiration for more ambitious climate action to end a catastrophic rise in global temperatures.
The authors also welcome the entry into force, on January 1, 2019, of the Kigali amendment, the ambition of which is to significantly reduce the future use of chemicals that release powerful greenhouse gases into the atmosphere. “.