A type of invisible, unpredictable air turbulence is expected to occur more frequently in the Northern Hemisphere as the climate warms, according to new research. The phenomenon, known as clear air turbulence, also increased in the Northern Hemisphere between 1980 and 2021, the study found. The research builds on recent work predicting an increase in moderate-to-strong clear-air turbulence by analyzing large-scale data sets and running complex model simulations. The study was published in Journal of Geophysical Research: Atmospheres. (Madeline Reinsel, more at phys.org)