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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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[–] nevemsenki@lemmy.world 49 points 5 months ago (29 children)

Ah yes, the usual method of waiting until the issue becomes confirmed and also way too severe to fix instead of acting on precaution and harming profits of private companies. What could go wrong?

[–] gian@lemmy.grys.it -4 points 5 months ago* (last edited 5 months ago) (5 children)

Ah yes, the usual method of waiting until the issue becomes confirmed and also way too severe to fix instead of acting on precaution and harming profits of private companies.

No, but as even them don't understand what the complications are and how much the damages could be, maybe to wait to have at least some hard number looks like a good idea.

What could go wrong?

And what could go wrong if we start to fight a problem that we don't understand how big it is, maybe using the wrong solution on a wrong scale ?

[–] dustyData@lemmy.world 5 points 5 months ago* (last edited 5 months ago) (3 children)

Perfect is the enemy of good.

If it is worth doing, it is worth getting it done, even if we aren't 100% certain or ready on a lot of things. Doctors don't wait for the worst before starting treatment. Specially if corrections carry none or way less risks than what is currently being done.

[–] hglman@lemmy.ml 4 points 5 months ago

Doing scientific experiments to understand the risks is worth doing.

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