Birdwatch Note Rating
2024-11-28 20:59:51 UTC - HELPFUL
Rated by Participant: CCD1452D9FE08DBE2FB1F2426975DD4D4CE813947331AC768473FD34F2B286BA
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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