天气尺度系统稳定性结构、相路特征的分岔及热源时间振荡影响问题的探讨

A STUDY ON THE STABILITY STRUCTURE OF SYNOPTIC SCALE SYSTEMS,THE BIFURCATION PROBLEM OF THE PHASE PATH CHARACTERISTICS AND THE INFLUENCE OF THE TIME-OSCILLATION OF HEAT SOURCE

中文摘要:

      本文研究了有关天气系统突变的非线性因子的影响效应,指出环境大尺度基本流场的平流输送及不同尺度系统的能量转换可能对天气尺度系统异变起了重要作用;由大气扰动偏离与趋于平衡态的过程,看出扰动发展与衰减的速率与平流输送、不同尺度能量转换的非线性作用有关,还研究了扰动稳定性结构与相路特征的分岔问题和热源对扰动解的影响效应,揭示出热源时间振荡与大气扰动存在着非线性的相关,可能导致扰动的突变.

英文摘要:

      The purpose of this paper is to discuss stability structure and bifurcation of phase path characteristics of synoptic scale system.The analysis results show that catastrophe of the synoptic scale disturbance can be caused by the nonlinear effects of barotropic,baroclinic instability and advection of ambient large scale flow.Also,foregoing nonlinear effects on velocity of development and decay of the system are presented in the processes deviating from equilibrium state or approaching to it.It has been found that there is a resonance phenomenon between the time-oscillation of heat source and the atmospheric disturbance.