对流发展局部气象条件的初步理论分析
ON THE LOCAL CONDITIONS OF CONVECTION DEVELOPMENT
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摘要: 分析了线性化后的小尺度动力学方程组出现不稳定解的条件,从而讨论了对流发展的局部天气条件,指出盛行风的垂直二次切变是一个稳定因子.同时指出,大范围对流云成排出现与风速垂直二次切变的存在有关.Abstract: By using the linearized equations for the small motion, the local conditions of convection development are discussed. It is shown that the vertical derivative of vertical shear of prevaling wind is a stable factor for the growth of disturbance, and further indicated that the presence of cumulus streets depends upon the type of profile of the prevaling wind.