Figure 6.

Time series of 10-min averages of the horizontal wind velocity u_mean, horizontal wind direction θ_mean, blown-sand impact count n_mean, estimated total aeolian sand flux Q_mean, and precipitation Pr; the time series of Q_O estimated from Equation (13) and the daily sensor height from the ground surface z_s are also shown. The solid gray lines in the top figure show the maximum and minimum instantaneous wind velocities. The wind direction is expressed clockwise from north, from 0° to 360°. Only the maximum n_mean for the four directions in each of the 10-min intervals is plotted.