Dynamic Behavior and Unstable State Evolution of Ocean-Atmosphere Oscillator  

作　　者：董文杰 封国林 

机构地区：[1]Laboratory for Climate Studies of China Meteorological Administration National Climate Center Beijing 100081,Laboratory for Climate Studies of China Meteorological Administration National Climate Center Beijing 100081 Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029,

出　　处：《Acta meteorologica Sinica》2005年第4期418-428,共11页

基　　金：Supported by the National Key Program for Developing Basic Sciences (2006CB400503).

摘　　要：It is mathematically and thoroughly proved in this paper that the nonlinearstochastic ocean-atmosphere oscillator model possesses a stable limit cycle; then the modelequations are transformed into the Fokker-Planck equation (FPE), and the evolution of ElNino-Southern Oscillation (ENSO) from unstable state to stable state is studied from the point ofview of nonequilibrium system dynamics. The study results reveal that although the complex nonlinearocean-atmosphere oscillator model possesses multiequilibrium states, the real climatic systempossesses only a quasi-normal state and a strong ENSO cycle stable state. The first passage timebetween states is also given in this paper, and the theoretical computational results agree withobservational data.It is mathematically and thoroughly proved in this paper that the nonlinearstochastic ocean-atmosphere oscillator model possesses a stable limit cycle; then the modelequations are transformed into the Fokker-Planck equation (FPE), and the evolution of ElNino-Southern Oscillation (ENSO) from unstable state to stable state is studied from the point ofview of nonequilibrium system dynamics. The study results reveal that although the complex nonlinearocean-atmosphere oscillator model possesses multiequilibrium states, the real climatic systempossesses only a quasi-normal state and a strong ENSO cycle stable state. The first passage timebetween states is also given in this paper, and the theoretical computational results agree withobservational data.

关 键 词：ENSO fokker-planck equation limit cycle ocean-atmosphere oscillator probability density 

分 类 号：P732[天文地球—海洋科学]