| Dynamic Behavior and Unstable State Evolution of Ocean-Atmosphere Oscillator |
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| 作者姓名： | DONG Wenjie FENG Guolin |
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| 作者单位： | 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 |
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| 基金项目： | Supported by the National Key Program for Developing Basic Sciences (2006CB400503). |
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| 摘 要： | 1. IntroductionThe Southern Oscillation and El Ni?o/La Ni?aare anomalous events which occur in the tropical at-mosphere and ocean respectively, and their physicalmechanisms have been successively studied in the re-cent half century. Bjerknes (1969) pointed out thatthe close link between Walk circulation and SST inthe equatorial Pacific is the manifestation of the inter-action of tropical atmospheric and oceanic motions.Therefore, Southern Oscillations and El Ni?o cycleswere described as …
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| 收稿时间： | 2005/5/13 0:00:00 |
| 修稿时间： | 2005/9/14 0:00:00 |
Dynamic Behavior and Unstable State Evolution of Ocean-Atmosphere Oscillator |
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| DONG Wenjie,FENG Guolin.Dynamic Behavior and Unstable State Evolution of Ocean-Atmosphere Oscillator[J].Acta Meteorologica Sinica,2005,19(4):418-428. |
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| Authors: | DONG Wenjie FENG Guolin |
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| Institution: | 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 |
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| Abstract: | It is mathematically and thoroughly proved in this paper that the nonlinear stochastic ocean-atmosphereoscillator model possesses a stable limit cycle; then the model equations are transformed into the Fokker-Planck equation (FPE), and the evolution of El Ni?o-Southern Oscillation (ENSO) from unstable state tostable state is studied from the point of view of nonequilibrium system dynamics. The study results revealthat although the complex nonlinear ocean-atmosphere oscillator model possesses multiequilibrium states,the real climatic system possesses only a quasi-normal state and a strong ENSO cycle stable state. The firstpassage time between states is also given in this paper, and the theoretical computational results agree withobservational data. |
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| Keywords: | ENSO Fokker-Planck equation limit cycle ocean-atmosphere oscillator probability density |
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