Birdwatch Note Rating
2024-11-29 06:29:39 UTC - HELPFUL
Rated by Participant: D25A1003EAB2F91B5CC771011008B31837D720915AF17DB77C6E624DB530950D
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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