Birdwatch Note Rating
2024-11-28 16:42:50 UTC - HELPFUL
Rated by Participant: 64C14C9BEA88B521E71DA2DF5EE5A18C9FE824D12059620E4DC602C5A3FC1F33
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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