this post was submitted on 20 Oct 2023
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[–] Edymos@lemmy.world 107 points 1 year ago (1 children)

Just end me already, no more edging

[–] stealthnerd@lemmy.world 101 points 1 year ago (1 children)

They don't know why the ozone hole is big this year but they suspect it may be related to a volcanic eruption. Article concludes that scientists expect the ozone layer to be back to normal by 2050.

The suggestion is that this is an unusual year for the ozone layer which sees the hole expand this time every year before retracting again by December. They never suggest human behavior is damaging it again.

[–] B0rax@feddit.de 11 points 1 year ago (2 children)

To be fair, the commenter did not suggest that. But a bigger ozone hole contributes to global warming.

[–] stealthnerd@lemmy.world 18 points 1 year ago (1 children)

I don't know what provoked the OP's comment. I just wanted to add context because I personally made a lot of bad assumptions from it before reading the article.

Also I don't know that your statement is accurate and global warming is never brought up in the article.

[–] RealFknNito@lemmy.world 1 points 1 year ago

A lot of us are just tired and know if it was human made, with no other context, it'd be another crisis for the pile.

[–] meekah@lemmy.world 5 points 1 year ago* (last edited 1 year ago)

as far as I understand, the presence of ozone causes a greenhouse effect. so an ozone hole should lessen the effects of global warming, if anything. Not to say we should be growing ozone holes of course

[–] macarthur_park@lemmy.world 27 points 1 year ago (3 children)

Lots of doom and gloom in the comments here. As the article describes, the hole in the ozone layer varies in size over time. It is slowly recovering, but the annual variability means it sometimes is larger than before.

The variability of the size of the ozone hole is largely determined by the strength of a strong wind band that flows around the Antarctic area. This strong wind band is a direct consequence of Earth's rotation and the strong temperature differences between polar and moderate latitudes.

If the band of wind is strong, it acts like a barrier: air masses between polar and temperate latitudes can no longer be exchanged. The air masses then remain isolated over the polar latitudes and cool down during the winter.

Although it may be too early to discuss the reasons behind the current ozone concentrations, some researchers speculate that this year’s unusual ozone patterns could be associated with the eruption of the Hunga Tonga-Hunga Ha'apai in January 2022.

And

Claus concludes, “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.”

[–] NOT_RICK@lemmy.world 3 points 1 year ago (1 children)

If only all the other ways we’re trashing this planet were as easy to solve as it was to simply ban CFCs

[–] Honytawk@lemmy.zip 6 points 1 year ago (1 children)

They aren't that difficult either, it just will have a bigger impact because we have been relying on them for longer.

Banning oil and single-use plastics would go a long way.

[–] NOT_RICK@lemmy.world 4 points 1 year ago

Yeah, but I’m wondering what can replace rubber tires. I was just reading about how they’re a massive source of microplastics and other pollutants in the environment

[–] Spzi@lemm.ee 1 points 1 year ago

This strong wind band is a direct consequence of Earth's rotation and the strong temperature differences between polar and moderate latitudes.

Sounds like something global warming can make worse.

Isn't the northern hemisphere jet stream struggling due to decreasing temperature differences, since the poles are warming faster? Which then causes weather to change less, making things more extreme?

[–] Desistance@lemmy.world 0 points 1 year ago* (last edited 1 year ago) (1 children)

The hole was set to be normal by now.

[–] Mothra@mander.xyz 25 points 1 year ago (3 children)

I haven't checked the article linked. I could swear about a month ago I saw a headline saying the ozone hole was slowly recovering?? No?? NASA backed research or something? Did I imagine it all?

[–] Erasmus@lemmy.world 10 points 1 year ago* (last edited 1 year ago)

Yeah you aren’t imagining it. I recall reading one a while back saying the hole in the ozone layer over Antartica was healed. I cannot find the article in particle but a quick google search turned up this one that said it closed in 2021

Edit: Antartica

[–] jaybone@lemmy.world 5 points 1 year ago

Yeah I thought I saw one around here recently that said it had recovered since the 80s or 90s since we stopped using certain aerosols and refrigerants.

[–] RickyRigatoni@lemmy.ml 2 points 1 year ago (2 children)

Best guess is the ozone is super sensitive to pollution and covid restrictions stopped.

[–] USSEthernet@startrek.website 2 points 1 year ago (2 children)

If everyone who could WFH did, I'm sure the lower carbon emissions from so many fewer cars on the road would have been a large help. Buuut noooo gotta be in the office so you can see me type a little.

[–] kerrigan778@lemmy.world 9 points 1 year ago

Carbon emissions don't contribute to the ozone hole, only certain pollutants

[–] Chainweasel@lemmy.world 2 points 1 year ago

You gotta be in the office so you stay in your district. If you could live anywhere and work the same job it would fuck up the gerrymandering

[–] SamboT@lemm.ee 2 points 1 year ago

Your best guess is wrong :)