Birdwatch Note Rating
2024-11-30 11:04:21 UTC - HELPFUL
Rated by Participant: 4E52A71113601976C6F513ACC4C53D70E212C1526D2A37B9AAD21D128E7FC878
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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