Characteristics of ENSO in IPCC&quots 20th-Centrury Climate Simulations: Regularity of the Periods

Abstract

We have used 'mean deviation of the power spectrum' in order to quantify the irregularity of the period. In particular, the coupled climate models exhibit relatively regular ENSO periodicity while some have the spread ENSO power spectra. The former four models are referred to as 'regular models' and the later four models as 'irregular models'.2