摘要
对东北冷涡加强和减弱阶段的涡度和动能的收支进行诊断分析。结果表明：无论在加强还是减弱阶段，冷涡区域范围整层的涡度变化均很明显；涡度平衡方程中，散度项、水平平流项及余项均是主要项，正涡度的增长和减弱对冷涡加强和减弱有重要贡献；动能收支方程中的各项也有明显差异，且在对流层中上层均有较强的能量交换过程。
It diagnostic study the vorticity budget and kinetic energy on intensification and weaken stage of cold vortex over Northeast China.Research has proved that vorticity variation is very obvious in the wholerange of cold vortex.The divergence,horizontal advection and residual therm of vorticity equation are major ones in the intesification and weaken stage of cold vortex.Each term of the kinetic energy is obvious different and there is energy conversion at middle level of the tropisphere.
出处
《黑龙江气象》
1998年第1期13-16,共4页
Heilongjiang Meteorology
关键词
东北冷涡
强度变化
涡度平衡
动能
诊断
冷涡
cold vortex over Northeast China intensity variation vorticity balance kinetic energy diagnostic
