Birdwatch Note Rating
2024-11-30 01:14:11 UTC - HELPFUL
Rated by Participant: E4B98E28A607C93D610A558E4BE6442FA14BD48D39F5FE96DB661D2A26CBC822
Participant Details
Original Note:
Persistent contrails occur when the humidity of the atmosphere is high and the contrail ice particles continue to grow by taking up water from the surrounding atmosphere. These can extend for large distances and last for hours. https://www.faa.gov/sites/faa.gov/files/regulations_policies/policy_guidance/envir_policy/contrails.pdf Persistent contrail photos from 1991-1940: https://contrailscience.com/contrail-photos-through-history/
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