The periodic oscillations in the ENSO recharge—discharge oscillator model

Wu-Fan, Zhang; Zhao, Q.

doi:10.1088/1674-1056/22/12/120201

Chinese Phys. B

2013

DOI: 10.1088/1674-1056/22/12/120201

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The periodic oscillations in the ENSO recharge—discharge oscillator model

Zhang Wu-Fan¹,

Q. Zhao²

Abstract: A class of recharge—discharge oscillator model for the El Niño/Southern Oscillation (ENSO) is considered. A stable limit cycle is obtained by transforming the ENSO model into the van der Pol-Duffing equation. We proved that there exists periodic oscillations in the ENSO recharge—discharge oscillator model.

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2014

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Cited by 2 publications

References 13 publications

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Noise assisted signal decomposition method based on complex empirical mode decomposition

Qu¹,

Wang²,

Gao³

et al. 2014

Acta Phys. Sin.

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The ensemble empirical mode decomposition has been proposed in order to alleviate mode mixing in empirical mode decomposition, but the ensemble average in it can always result in new mode mixing, spectrum losing, and computational cost increasing, which can affect the analysis and extraction of signal physical characteristics. To tackle these problems, a noise-assisted signal decomposition method based on complex empirical mode decomposition is proposed, in which the mode mixing is reduced by taking the projection of intrinsic mode functions decomposed from white noise as basis functions for signal extrema extraction. While the problems result from ensemble average are reduced because the effects of noise projection are eliminated in the process of calculating the envelope barycenter. Simulation results show that our method has further reduced mode mixing, and speeded up the operation rate visibly and alleviated spectrum losing to a certain degree.

show abstract

Noise assisted signal decomposition method based on complex empirical mode decomposition

Qu¹,

Wang²,

Gao³

et al. 2014

Acta Phys. Sin.

View full text Add to dashboard Cite

show abstract

Hopf bifurcation and chaos in the solar-forced El Niño /Southern Oscillation recharge oscillator model

Wu-Fan¹,

Zhao²

2014

Acta Phys. Sin.

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A class of solar-forced recharge oscillator model for the El Niño /Southern Oscillation (ENSO) is considered. By transforming the ENSO model equations into the van der Pol-Duffing oscillator with periodic forcing, we obtain the Hopf bifurcation conditions by the harmonic balance method. Numerical simulations also show that the 11-yr solar-cycle forced ENSO system undergoes a transition from the quasi-periodicity route to chaos as the solar-cycle forcing is increased.

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The periodic oscillations in the ENSO recharge—discharge oscillator model

Cited by 2 publications

References 13 publications

Noise assisted signal decomposition method based on complex empirical mode decomposition

Noise assisted signal decomposition method based on complex empirical mode decomposition

Hopf bifurcation and chaos in the solar-forced El Niño /Southern Oscillation recharge oscillator model

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