THE ANALYSIS OF FRONTOGENESIS PROCESS FORCED BY DUST RADIATIVE HEATING

In this paper,the physical mechanism affected the frontogenesis process under force of dust radiative heating is discussed by using frontal equation and the results of two-dimension numerical model simulation.The ef f ect of the distribution of dust on the frontogenesis process is also calculated.The calculation and analysis results indicate:In daytime,frontogenesis is mainly produced by diabatic heating and horizontal velocity deformation field.The effect of vertical velocity field on the frontogenesis is weak,it mainly result in frontolysis.The horizontal advection term contribute little to the frontogenesis and frontolysis.In night,the diabatic heating term is dominant factor which results in frontolysis.When dust descent,both the frontal intension and slope,as well as the isentropic potential temperature layer above duststorm center,decrease.