暴雨系统不同尺度动能相互作用过程

选取一次梅雨期暴雨过程，对实测资料用Ｂａｒｎｅｓ尺度分离方法经自适应技术处理后，应用动能相互作用方程组，计算出雨区内对流层高、中、低各层次方程各项的时空平均值．就整层而言，天气尺度动能主要源和汇分别是产生项和水平输出，而中尺度系统则为对流正反馈和空气逆气压梯度运动所消耗的动能两者接近平衡，两种尺度流场和质量场之间相互作用所制造的动能向两种尺度系统转换．

Scale Interaction of Kinetic Energy in the Rainstorm Systems

By using a horizontal filtering scheme after a self-adaptive principle,a set of budget equations for a rainstorm case during the Met-Yu season is computed to describe the energetics of the lower,middle and upple tropospere.As far as the entire layer is concerned,the cross-contour generation and horizontal export are the prominent energy source and sink for the synoptic scale. The positive feedback of convective activity is balanced by negative generation for the mesoscale. The kinetic energy produced by interaction between wind and mass fields of both scales transforms into the synoptic and mesoscale systems.