For 10 points, name this physical phenomena that is responsible for Aeolian processes like erosion.
In snow formations, this phenomenon is responsible for producing gastrugi, and sudden examples of this phenomena include the squamish and the willawaw. The power density of this phenomenon is rated by it's NREL class, and the relationship between height and the intensity of this phenomenon depends on the Hellman exponent. One type of this phenomenon is caused by a difference in adiabatic lapse rates on the two sides of a (*) mountain and is called Foehn, and those under the influence of gravity that carries high-density constituents is called katabatic. The slip face of barchans get their shape from facing this phenomenon, which is also responsible for transporting sand grains by saltation and building sand dunes. For 10 points, name this physical phenomena that is responsible for Aeolian processes like erosion.
In snow formations, this phenomenon is responsible for producing gastrugi, and sudden examples of this phenomena include the squamish and the willawaw.
wind [accept answers like air currents]