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A conceptual model for the aperiodicity of interannual variability in the tropics
Author(s) -
Krishnamurthy V.,
Goswami B. N.,
Legnani Roberto
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl00206
Subject(s) - nonlinear system , tropics , climatology , mode (computer interface) , conceptual model , atmospheric sciences , environmental science , low frequency , physics , geology , statistical physics , meteorology , computer science , ecology , biology , quantum mechanics , astronomy , operating system , database
We propose that the broad spectrum of interannual variability in the tropics with a peak around four years results from an interaction between the linear low frequency oscillatory mode of the coupled system and the nonlinear higher frequency modes of the system. We illustrate this using a conceptual model where the higher frequency modes, represented by a nonlinear low‐order model, are coupled to a low frequency linear oscillator.