Which outcome occurs when wind speed falls below the threshold needed to transport sand grains in a dune landscape?

💡 Explanation

Saltation ceases because the aerodynamic lift and drag forces are insufficient to keep grains airborne; therefore ripple formation stops because wind can no longer move material, rather than dune horns migrating or ridges broadening which require sustained periods of strong winds.

• Which effect results when a high-pressure system diverts wind?
• Which geomorphic outcome accelerates when Arctic permafrost thaws containing large amounts of trapped organic matter?
• Which oceanographic consequence results from intensification of the planetary Coriolis effect at higher latitudes?
• Which process causes subsidence on the downthrown side of a growing normal fault?
• Which localized effect results when strong katabatic winds flow downslope from Antarctic ice sheets?
• Which deformation process primarily occurs at a terrestrial transform plate boundary due to strain accumulation?