Dust aerosol transportation characteristic in Yanchi area of Ninxia autonomous region during spring

Using in situ observations, study is performed on a few related properties of wind raised sand grains during sandstorms in the Yanchi area of Ninxia in NW China, indicating that the critical wind responsible for sands lifting from 10 m level above surface is 5.0 m/s and the critical frictional velocity is 0.32 m/s, the maximal amount of sand transport is 12.42 kg m^-1 based on the "scheme of maximum possible sand transport" proposed by Ling and the distance over which such aerosol particles travel is 1.4 10⁵~1.4X10⁶ km.