华南春季强对流天气过程的动能收支——(一)总动能收支  

KINETIC ENERGY BUDGETS OF AN INTENSE CONVECTION EVENT DURING SPRING OVER SOUTH CHINA, PART I:BUDGETS OF TOTAL KINETIC ENERGY

作　　者：漆小平[1] 贺海晏[1] 罗会邦 

机构地区：[1]中山大学大气科学系

出　　处：《热带气象》1992年第1期44-51,共8页

摘　　要：本文利用常规探测资料计算和分析了1983年3月1日影响珠江三角洲的一次强对流天气过程的总动能收支。结果表明:就时间区域平均而言,动能制造项是总动能源,动能水平通量散度和次网格尺度过程则消耗区域的动能;几乎所有的主要收支项数值,都在高空急流所在的对流层上层最大;网格尺度的垂直输送使动能由对流层中、低层向高层输送,但次网格尺度过程使动能下传。在风暴影响前后,各能量的收支项都有明显的改变。The total kinetic energy budgets of an intense convection event occurred on the 1st March 1983 over the Pearl River delta in South China have been diagnostically studied in this paper by the use of operational observation data. The results show that the generation term is, for the time-area mean,a dominant source; The divergence of horizontal energy flux and sub-grid processes act as major sinks in the total energy balance. Almost all major budget terms peak their values in the upper tropospheric layer in which the high level southwesterly jet is located. It is also observed that a certain amount of kinetic energy is transported upwards from middle and lower layers to the upper troposphere by resolvable scale vertical motion and downwards by sub-grid processes. Major budget terms show substantial changes in value before and after the peak storm activity.

关 键 词：华南地区 强对流天气 过程分析 动能 次网格尺度 春季 

分 类 号：P458.1[天文地球—大气科学及气象学] P442