Mixed-mode oscillations of El Niño-Southern Oscillation

Andrew Roberts, John Guckenheimer, Esther Widiasih, Axel Timmermann, Christopher K.R.T. Jones

Research output: Contribution to journalArticle

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Abstract

Very strong El Niño 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 Niño-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.

LanguageEnglish (US)
Pages1755-1766
Number of pages12
JournalJournal of the Atmospheric Sciences
Volume73
Issue number4
DOIs
StatePublished - Apr 1 2016

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El Nino-Southern Oscillation
oscillation
El Nino
climate modeling
climate
ocean
ocean circulation

Keywords

  • Atm/Ocean structure/ Phenomena
  • Circulation/ dynamics
  • Differential equations
  • El Nino
  • ENSO
  • La Nina
  • Mathematical and statistical techniques
  • Models and modeling
  • Nonlinear models
  • Southern oscillation

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Roberts, A., Guckenheimer, J., Widiasih, E., Timmermann, A., & Jones, C. K. R. T. (2016). Mixed-mode oscillations of El Niño-Southern Oscillation. Journal of the Atmospheric Sciences, 73(4), 1755-1766. DOI: 10.1175/JAS-D-15-0191.1

Mixed-mode oscillations of El Niño-Southern Oscillation. / Roberts, Andrew; Guckenheimer, John; Widiasih, Esther; Timmermann, Axel; Jones, Christopher K.R.T.

In: Journal of the Atmospheric Sciences, Vol. 73, No. 4, 01.04.2016, p. 1755-1766.

Research output: Contribution to journalArticle

Roberts, A, Guckenheimer, J, Widiasih, E, Timmermann, A & Jones, CKRT 2016, 'Mixed-mode oscillations of El Niño-Southern Oscillation' Journal of the Atmospheric Sciences, vol. 73, no. 4, pp. 1755-1766. DOI: 10.1175/JAS-D-15-0191.1
Roberts A, Guckenheimer J, Widiasih E, Timmermann A, Jones CKRT. Mixed-mode oscillations of El Niño-Southern Oscillation. Journal of the Atmospheric Sciences. 2016 Apr 1;73(4):1755-1766. Available from, DOI: 10.1175/JAS-D-15-0191.1
Roberts, Andrew ; Guckenheimer, John ; Widiasih, Esther ; Timmermann, Axel ; Jones, Christopher K.R.T./ Mixed-mode oscillations of El Niño-Southern Oscillation. In: Journal of the Atmospheric Sciences. 2016 ; Vol. 73, No. 4. pp. 1755-1766
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