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Cake day: August 18th, 2023

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  • TheHarpyEagle@lemmy.worldtoScience Memes@mander.xyzCFCs
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    6 months ago

    Models suggest that the concentration of chlorine and other ozone-depleting substances in the stratosphere will not return to pre-1980 levels until the middle decades of the 21st century. Scientists have already seen the first definitive proof of ozone recovery, observing a 20 percent decrease in ozone depletion during the winter months from 2005 to 2016. In 2019, abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion, leading to the smallest hole since 1982. Models predict that the Antarctic ozone layer will mostly recover by 2040.



  • TheHarpyEagle@lemmy.worldtoScience Memes@mander.xyzCFCs
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    6 months ago

    Is this true? An article from 2022 indicates things are getting better, just slowly

    Today, the ozone hole still exists, forming every year over Antarctica in the spring. It closes up again over the summer as stratospheric air from lower latitudes is mixed in, patching it up until the following spring when the cycle begins again. But there’s evidence it’s starting to disappear – and recover more or less as expected, says Solomon. Based on scientific assessments, the ozone layer is expected to return to pre-1980 levels around the middle of the century. Healing is slow because of the long lifespan of ozone-depleting molecules. Some persist in the atmosphere for 50 to 150 years before decaying.

    https://www.bbc.com/future/article/20220321-what-happened-to-the-worlds-ozone-hole