雲粒では、半径 r ～ 0.1μm 。

A. S. Ackerman, O. B. Toon & Peter V. Hobbs, A model for particle microphysics, turbulent mixing, and radiative transfer in the stratocumulus-topped marine boundary layer and comparisons with measurements. J. Atmos. Sci., 52, 1204-1236 (1995). p.1208.