A Nonlinear Mechanism for Decadal El NiñO Amplitude Changes

Details A Nonlinear Mechanism for Decadal El NiñO Amplitude Changes A Nonlinear Mechanism for Decadal El NiñO Amplitude Changes

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29a...3t&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 1, pp. 3-1, CiteID 1003, DOI 10.1029/2001GL013369

Physics

Geophysics

27

Oceanography: Physical: El Nino, Global Change: Climate Dynamics (3309), Oceanography: General: Climate And Interannual Variability (3309), Mathematical Geophysics: Chaos

Scientific paper

Based on the analysis of a low-order tropical atmosphere-ocean model we propose a nonlinear mechanism explaining several features of the observed El Niño-Southern Oscillation (ENSO) phenomenon: ENSO irregularity, ENSO Amplitude Modulations and decadal tropical climate variability. The mechanism suggested here is based on the idea of homoclinic/heteroclinic orbits, an inherently nonlinear concept. It turns out that this mechanism operates even in the presence of wind noise and is consistent with results from intermediate ENSO model simulations.

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