The third type of lift is Wave lift. The image above displays the wind flowing over Devils Peak and Table Mountain. The air flows down the mountain on the lee side and then gets forced up again when it hits the ground. The air in the lee side of the mountain can often be very turbulent as the wind rotors in the lee side as it flows down the mountain.
Wave lift is created by the obstruction of airflow in the lee side of a mountain, provided that there is a steady increase in wind strength with altitude without a significant change in direction, standing waves may be created.
The lee waves occur near mountains and the airflow can generate standing waves with alternating areas of lift and sink. The top of the Wave is often marked by the formation of lenticular (lens like) clouds.
Unfortunately this type of lift is not suited for Paragliding because it tends to involve high winds of 25 knots plus. This type of lift is well suited for hang gliders and fixed-wing gliders or sailplanes.
The image above displays Betty’s Wave. The lenticular cloud can clearly be seen forming above the Cumulus clouds.
In our next article we will discuss Convergence.