Decrease in the radius of a haze particle made of C₂H₂ and C₂H₆ ice in Uranus atmosphere due to evaporation, for different initial radii at p=0.1 bar and saturation conditions (0.4, 0.6, and 0.8). The evaporation rates and terminal velocities are derived from the integration of Eqs. (2)–(3), considering a single particle with the initial radius shown in the upper part of the figures. In all the cases the haze particle get totally evaporated before reaching the 1.2 bar level layer.