Birdwatch Note Rating
2024-11-28 13:55:54 UTC - HELPFUL
Rated by Participant: 8917F2CDB7A10EAB25718DAE83133DE7B8EC1EE5D4EFAF4227383087BBE179EA
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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