Microturbulence is a form of turbulence that varies over small distance scales.
[1] Stellar microturbulence varies with the effective temperature and the surface gravity.
When examined by a spectroscope, the velocity of the convective gas along the line of sight produces Doppler shifts in the absorption bands.
In massive stars convection can be present only in small regions below the surface; these sub-surface convection zones can excite turbulence at the stellar surface through the emission of acoustic and gravity waves.
[5] Microturbulence plays a critical role in energy transport during magnetic nuclear fusion experiments, such as the Tokamak.