Figure 5.

Three examples of simulated insect altitudinal flight trajectories that, after an initial ascent to 150 m, thereafter responded to gusts in vertical wind speed by climbing or descending in the direction of the gust with a vertical airspeed of w_f=0.3 m s⁻¹ when the vertical wind speed exceeds w_c=0.1 m s⁻¹. It is evident that insects arriving at the top of the inversion layer can remain there for several hours. The stable boundary layer has height z=200 m.