Comment on The ozone hole above Antarctica has grown to three times the size of Brazil

JackGreenEarth@lemm.ee ⁨11⁩ ⁨months⁩ ago

• Deceptichum@kbin.social ⁨11⁩ ⁨months⁩ ago

  China.

  We show that emissions from eastern mainland China are 7.0 ± 3.0 (±1 standard deviation) gigagrams per year higher in 2014–2017 than in 2008–2012, and that the increase in emissions arises primarily around the northeastern provinces of Shandong and Hebei. This increase accounts for a substantial fraction (at least 40 to 60 per cent) of the global rise in CFC-11 emissions. We find no evidence for a significant increase in CFC-11 emissions from any other eastern Asian countries or other regions of the world where there are available data for the detection of regional emissions.

  https://www.nature.com/articles/s41586-019-1193-4

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  • chuckleslord@lemmy.world ⁨11⁩ ⁨months⁩ ago

    Read my comment.

    The hole is healing, it isn’t healed. It no longer poses a threat to most populations, but it ebbs and flows. Estimates for total healing (pre-1980 levels) are 2040.

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• The_Picard_Maneuver@startrek.website ⁨11⁩ ⁨months⁩ ago

  I thought it was gone

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  • GreenMario@lemm.ee ⁨11⁩ ⁨months⁩ ago

    I was told it was fixed. WTF?

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    • TheFriar@lemm.ee ⁨11⁩ ⁨months⁩ ago

      Yeah, that’s what I heard too. And it was because of CFC’s and wasn’t related to climate change. Once CFCs were outlawed, I heard the hole in the ozone was fixing itself (and ultimately fixed).

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      • Zron@lemmy.world ⁨11⁩ ⁨months⁩ ago

        Seen a lot of “trades” videos out of china with refrigerant cylinders in the back that look suspiciously like R-12 and R-22 cylinders.

        You know, the refrigerants that were eating into the ozone layer.

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    • Mongostein@lemmy.ca ⁨11⁩ ⁨months⁩ ago

      That was the hole above California. This hole is above Antarctica, apparently caused by emissions drifting from China.

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  • chuckleslord@lemmy.world ⁨11⁩ ⁨months⁩ ago

    It’s been continuously shrinking. It takes time for it heal and it ebbs and flows with the seasons. It won’t close until 2040.

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• Evilphd666@hexbear.net ⁨11⁩ ⁨months⁩ ago

  One possible reason for the higher-than-normal growth is the Hunga Tonga volcanic eruption in January 2022, which introduced massive quantities of water vapor into the air. “The water vapor could have led to the heightened formation of polar stratospheric clouds, where chlorofluorocarbons (CFCs) can react and accelerate ozone depletion," said Inness.

  Yet despite experiencing large seasonal growth this year, the ozone hole is still decreasing in size overall. “Based on the Montreal Protocol and the decrease of anthropogenic ozone-depleting substances, scientists currently predict that the global ozone layer will reach its normal state again by around 2050,” 

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  • Fulthi@kbin.social ⁨11⁩ ⁨months⁩ ago

    I learned about the Tonga eruption recently and it is wild.

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    • Annoyed_Crabby@monyet.cc ⁨11⁩ ⁨months⁩ ago

      Ahh shit it’s Tonga time.

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• chuckleslord@lemmy.world ⁨11⁩ ⁨months⁩ ago

  It is, but it ebbs and flows over time, with the seasons. Lots of natural processes can interact with the ozone levels. It should be back to 1980 levels by 2040.

  Read my comment

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