Birdwatch Note Rating
2024-11-28 19:05:31 UTC - HELPFUL
Rated by Participant: 4BD29BED71838318EBE5E676E5A65D50D72962CCC7CDC7B54015798B07B9D227
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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