Birdwatch Note Rating
2024-04-29 16:50:48 UTC - HELPFUL
Rated by Participant: 77F3621FF8FA173FA4ACD668DF010C276EAE695AC375074FD5F7766FA71A337C
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Original Note:
The width and length of contrails depends on atmospheric conditions present when the jet passes through. Long narrow contrails are “non-spreading persistent contrails” that require a humid/damp atmosphere. This type of contrail can be visible for up to an hour. https://www.scientificamerican.com/article/why-do-jets-leave-a-white/ https://www.spartan.edu/news/trails-in-the-sky-all-about-contrails/ https://www.space.com/what-are-contrails
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