Impact of a modified convective scheme on the Madden-Julian Oscillation and El Niño - Southern Oscillation in a coupled climate model

Xiaoqing Wu*, Liping Deng, Xiaoling Song, Guido Vettoretti, W. Richard Peltier, Guang Jun Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

The connection between the intraseasonal Madden-Julian Oscillation (MJO) and interannual El Niño - Southern Oscillation (ENSO) has been proposed and investigated for the last two decades. However, many fully coupled atmosphere-ocean general circulation models (GCMs) are still unable to simulate many important characteristics of these two phenomena partly due to the great uncertainty in the representation of subgrid-scale cloud systems. We report herein the simulation of an El Niño in a fully coupled GCM with a modified convection scheme, which captures many of the observed features of the 1997/1998 El Niño event. The representation of convection in the coupled model plays a major role in modeling both interannual ENSO and intraseasonal MJO variability in closer accord with observations, and in reproducing the evolution of 1997/1998 El Niño-type events.

Original languageEnglish (US)
Article numberL16823
JournalGeophysical Research Letters
Volume34
Issue number16
DOIs
StatePublished - Aug 28 2007

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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