Editing Openai/680a25f8-9f18-8004-a42d-cd36374ba000 (section)

=== User: He's now bleating, "Paul’s AI written summary is not accurate ===
He's now bleating, "Paul’s AI written summary is not accurate>
Paul argued that 20 µm ice crystals absorb enough solar radiation to heat by ~20 K, driving a quadrupling of vapor pressure and requiring an ambient relative humidity with respect to ice (RHi) of ~375% to prevent rapid sublimation — far above typical atmospheric levels.
However, his argument incorrectly applied bulk ice optical properties to small particles, overstated absorptivity, and consequently exaggerated the particle temperature rise. Correct physics shows that 20 µm ice crystals have a broadband solar absorptivity around 0.25–0.35, leading to a temperature increase of only ~11–13 K (to ~234–236 K), not 20 K. The corresponding vapor pressure increase is about 2×, not 4×, meaning the required RHi for stability is ~187%, not 375%. In real contrail conditions, where ambient RHi is often 140–160% and local humidification from wake turbulence is significant, ice crystals can persist for minutes to hours, even in direct sunlight.
Thus, Paul’s claims collapse under proper radiative transfer, thermodynamics, and microphysics, and persistent contrails are fully physically consistent with observed atmospheric behavior."

Can you shut him down hard and fast?