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SpaceX's Starlink May Be Keeping the Ozone From Healing, Research Finds (futurism.com)

submitted 5 months ago* (last edited 5 months ago) by Gsus4@programming.dev to c/technology@lemmy.world

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Abstract from the paper in the article:

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL109280

Large constellations of small satellites will significantly increase the number of objects orbiting the Earth. Satellites burn up at the end of service life during reentry, generating aluminum oxides as the main byproduct. These are known catalysts for chlorine activation that depletes ozone in the stratosphere. We present the first atomic-scale molecular dynamics simulation study to resolve the oxidation process of the satellite's aluminum structure during mesospheric reentry, and investigate the ozone depletion potential from aluminum oxides. We find that the demise of a typical 250-kg satellite can generate around 30 kg of aluminum oxide nanoparticles, which may endure for decades in the atmosphere. Aluminum oxide compounds generated by the entire population of satellites reentering the atmosphere in 2022 are estimated at around 17 metric tons. Reentry scenarios involving mega-constellations point to over 360 metric tons of aluminum oxide compounds per year, which can lead to significant ozone depletion.

PS: wooden satellites can help mitigate this https://www.nature.com/articles/d41586-024-01456-z

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[–] Dasus@lemmy.world 0 points 5 months ago (2 children)

Might I enquire as to where this remote location might be?

Like on a general basis, no need for addresses.

As a Finn I'm forever spoiled in terms of wireless coverage. We got tons of solitary forests. But you can get an internet connection in literally all of them.

97% of the country gets 4g. And not of the people. The country.

[–] Hadriscus@lemm.ee -1 points 5 months ago

We're in Mayotte. Two undersea cables connect us to nearby continents (cf submarinecablemap.com) but they're down most of the time. We haven't had a connection in the last six months so we finally subbed to Starlink. Well, strictly speaking there was a connection but it would take anywhere between 5mn to 15mn to load the text of a static webpage, no images or anything else... forget about sending data, using forums... I had to get out and walk uphill for a minute or two to use my phone's cell data

[–] enbyecho@lemmy.world -1 points 5 months ago

I live in rural California. We only just this year are able to pick up a faint LTE signal. I think it might get us a very unstable 1-2 Mbps if we hold the phone just right. We have no cable, DSL or other land-based options and because of the topography can't pick up the local wireless provider, which is very expensive anyway - like $175/month for 50/5

So without Starlink our only options are crappy regular satellite providers like Hughesnet which impose very low quotas - 10 GB monthly for day time usage - and have insane latency.

It bugs the shit out of me I have to give money to that fuckwit but without it we live in the dark ages.