“96.8”暴雨过程中不同尺度系统的相互作用  

INTERACTIONS OF DIFFERENT SCALE SYSTEMS IN THE “96.8” TORRENTIAL RAIN EVENT

作　　者：姚秀萍[1] 于玉斌[1] 

机构地区：[1]北京气象学院

出　　处：《南京气象学院学报》1998年第3期432-439,共8页Journal of Nanjing Institute of Meteorology

摘　　要：利用动能方程计算了天气尺度、次天气尺度的动能以及非线性相互作用的动能，分析了“９６．８”暴雨过程强降水时段的主要动力过程。结果表明：在暴雨系统中，存在着天气尺度和次天气尺度系统间的相互作用，天气尺度动能减小，次天气尺度动能增加，即对于次天气尺度系统而言，天气尺度系统是一个动能源；通过非线性相互作用，天气尺度系统把动能传递给次天气尺度系统，使暴雨系统得以发展。Using the kinetic energy equations and the routine sonde data, each term in the synoptic scale, subsynoptic scale and nonlinear interaction kinetic energy equation is respectively calculated in this paper in order to analyze the main dynamical processes in the '96.8' torrential rain event. The results show that there exist nonlinear interactions between synoptic and subsynoptic systems in the event. By which the kinetic energy of the synoptic system is reduced and that of the subsynoptic system is increased. In other words, the synoptic system acts as a source of kinetic energy for the subsynoptic system to grow the torrential rain system.

关 键 词：暴雨系统 非线性 相互作用 暴雨 天气尺度 

分 类 号：P458.121.1[天文地球—大气科学及气象学]