Mixed-Mode Oscillations of El Nino-Southern Oscillation

被引：27

作者：

Roberts, Andrew ^{[1
]}

Guckenheimer, John ^{[1
,5
]}

Widiasih, Esther ^{[2
]}

Timmermann, Axel ^{[3
]}

Jones, Christopher K. R. T. ^{[4
]}

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

[2] Univ Hawaii West Oahu, Kapolei, HI USA

[3] Univ Hawaii Manoa, Honolulu, HI 96822 USA

[4] Univ N Carolina, Chapel Hill, NC USA

[5] Cornell Univ, Dept Math, 310 Malott Hall, Ithaca, NY 14853 USA

来源：

JOURNAL OF THE ATMOSPHERIC SCIENCES | 2016年 / 73卷 / 04期

基金：

美国国家科学基金会;

关键词：

La Nina; Circulation/; Dynamics; Differential equations; Southern Oscillation; Models and modeling; Atm/Ocean Structure/ Phenomena; ENSO; El Nino; Nonlinear models; Mathematical and statistical techniques; SINGULAR PERTURBATION-THEORY; SUBTHRESHOLD OSCILLATIONS; SEASONAL CYCLE; CIRCULATION FEATURES; ENSO; NEURONS; BIFURCATION; FREQUENCY; CANARDS; CHAOS;

D O I：

10.1175/JAS-D-15-0191.1

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Very strong El Nino events occur sporadically every 10-20 yr. The origin of this bursting behavior still remains elusive. Using a simplified three-dimensional dynamical model of the tropical Pacific climate system, which captures El Nino-Southern Oscillation (ENSO) combined with recently developed mathematical tools for fast-slow systems, the authors show that decadal ENSO bursting behavior can be explained as a mixed-mode oscillation (MMO), which also predicts a critical threshold for rapid amplitude growth. It is hypothesized that the MMO dynamics of the low-dimensional climate model can be linked to a saddle-focus equilibrium point, which mimics a tropical Pacific Ocean state without ocean circulation.

引用

页码：1755 / 1766

页数：12

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