摘要
本文研究了一类太阳强迫的厄尔尼诺/南方涛动(ENSO)充电振子数理模型,通过数学变换将此ENSO振子方程组变换为有周期强迫项的van der Pol-Duffing方程,利用谐波平衡法定性分析得到此ENSO系统发生Hopf分岔的条件并做简单数值模拟,结果发现随着强迫作用增大,11年周期太阳循环强迫的ENSO系统经历准周期、倍频锁相到混沌的过程.
A class of solar-forced recharge oscillator model for the El Nino /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 solarcycle forced ENSO system undergoes a transition from the quasi-periodicity route to chaos as the solar-cycle forcing is increased.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第21期1-4,共4页
Acta Physica Sinica
基金
国家自然科学基金(批准号:40975028和41175052)资助的课题~~
