Birdwatch Note Rating
2024-11-28 13:54:07 UTC - HELPFUL
Rated by Participant: 2A6B630D0AEA2ACC36E2189A989B042C8F44788D5C6526EF4EAC8856A79A73D8
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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