关于影响超级对流单体形成因素的数值试验

THE NUMERICAL EXPERIMENTS ABOUT THE EFFECTS OF SEVERAL FACTORS ON THE FORMATION OF SUPERCELL AIRFLOW PATTERN

The factors controling the evolution of convective air flow can be classified into two kinds. The ones are environmental factors such as buoyancy and wind shear; The others are derivative factors associated with convective development such as the interruption of horizontal velocity of air motion beneath the cloud base and the propagation of convective air flow field relative to hydrometeor. In order to explore the effects of these factors on the formation of supercell storm the numerical experiments have been done with two-dimensional model (TDHM).The results indicate that the environmetal factors are basic ones which determine the embryonic form of convective air flow pattern, the derivative factors affect the evolutional direction of air flow pattern. The proper coordination of both factors favour the formation of supercell.