强风暴的中尺度环境场动能收支分析

本文计算分析了珠江三角州附近地区强风暴的中尺度环境场的动能收支,着重比较了风暴发展过程中不同阶段的能量学特征。结果表明,在风暴的不同阶段,能量收支差异最大的区域是在对流层的上部,即在对流的强盛期,对流层上部有强的动能水平通量辐散,而且反映次网格尺度作用的余差项也是较大的正值;而在对流的前期或后期,这些项的量值则有明显的不同。此外,在对流强盛期,动能的铅直输送项也比其他阶段的大得多。

A Study of Kinetic Energy Budget of the Meso-scale Severe Storm Environment

Kinetic energy budgets of meso-scale storm environment are investigat- ed. The emphasis is given to a detail comparison of energetic characters in diff- erent stages of the strom development process. The results show that the diverg- ence of horizontal flux and upwaad transport of energy, as well as dissipation term in tle intense convection stage significantly differ from those in the other stages.