热带大气周期性振荡相图结构与南北半球中纬度热力强迫效应的相关关系

本文根据反映热带大气运动的动力系统数学模型,将热带大气周期性振荡产生条件归纳为动力系统相图椭圆型结构形成问题.本文强调了南北半球中纬度冷暖空气活动对赤道地区热力结构的强迫效应,探讨了此类赤道地区外界热力强迫对热带大气运动周期性振荡形成的作用.本文还讨论了与非周期运动相关的动力系统相图椭圆型结构破坏问题及其相图抛物型、双曲型构成前提条件,并研究了各类相图几何图形特征点与大气运动状态的联系.本文研究还表明,南北半球中纬度冷暖空气活动即使属非周期扰动,若满足动力系统相图椭圆型条件,也可引起赤道地区的高频或低频周期性振荡.

Correlations between the Phase Diagram Structures of Periodic Oscillations in the Tropical Atmosphere and Thermal Forcing from Midlatitudes of the Southern and Northern Hemispheres

Based on a mathematic model of the dynamic system of the tropical atmospheric motion, the cause of periodic oscillations is attributed to the elliptic condition of phase diagram of the dynamical system. The current research emphasizes the effects of cold and warm air activities from midlatitudes of the Southern and Northern Hemispheres on thermal structure of the atmosphere over tropical area, and explores the effect of those external thermal forcing on the formation of in the periodic oscillations tropical atmosphere.