Birdwatch Note Rating
2024-10-09 18:00:10 UTC - HELPFUL
Rated by Participant: BF134F0507C175B901A56206CF85CB205C792F6499701C4C77318214BFB7794A
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Original Note:
Ice crystals can form as a result of a hydrocarbon fuel burning in the extreme conditions at flight level. If the relative humidity is high, they will persist as it is physically impossible for them to sublimate back into a vapor. Contrails have been recorded since 1919. https://www.metlink.org/fieldwork-resource/contrails/ https://scied.ucar.edu/image/persistent-spreading-contrails https://www.globe.gov/web/s-cool/home/observation-and-reporting/contrails/history-of-contrails-and-contrail-research2
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