Science Daily  July 12, 2023 Although clear air turbulence (CAT) generation in the free atmosphere has been studied by high-resolution numerical simulations, few studies simulated aircraft-scale turbulence eddies and validated them with high-frequency airborne observation. Researchers in Japan used a regional numerical weather prediction model to simulate the event with fine resolution. They compared the onboard-recorded data with the virtual flight data, to confirm that turbulent eddies were reasonably reproduced. The CAT was largely generated by breaking Kelvin-Helmholtz (KH) instability waves in the free atmosphere. They resolved the KH waves and their breaking. When the resolution was finer, the turbulent […]