Simulation of Effect of Climate Factors on Dust Storm Frequencies in Mid-and North-Parts of Ningxia

Using the milt-year meteorological data at six representative stations in the mid-and north-parts of Ningxia, the effects of the monthly mean wind velocity, soil moisture and coefficient of wind erosion and desertification in underlying surface on sand storm frequencies are analyzed. The effect indexes of the climatic factors on sand storm frequencies are calculated. Also the regression equation suitable for fitting sand storm frequencies in the mid-and north-parts of Ningxia have been finished.