Lift-off parameters of saltating particles on Mars

The aeolian events are frequent on Mars. However, we have very limited understanding of aeolian process, because we cannot conduct experiments, as we did on Earth, on martian surface directly right now. In this paper, we studied the lift-off parameters of saltating particles in wind-blown sand on Mars systematically through a numerical way. The main findings are shown as follows: (1) the lift-off speeds of martian particles increase linearly with wind shear velocities; (2) the lift-off speeds of particles on Mars have the same order of magnitude as but a little smaller than those on Earth at the same shear velocity; (3) the lift-off angles on Mars are almost equal to those on Earth and have weak dependence on shear velocities; (4) the lift-off parameters (both speeds and angles) are influenced by particle diameters.