Birdwatch Note Rating
2024-12-30 18:40:48 UTC - HELPFUL
Rated by Participant: EA55B82874BF100CB1EFF3083CF9B6B09DC655FBCE87C9838FADACDDD4694DA4
Participant Details
Original Note:
These 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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