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Impact of a modified convective scheme on the Madden‐Julian Oscillation and El Niño–Southern Oscillation in a coupled climate model
Author(s) -
Wu Xiaoqing,
Deng Liping,
Song Xiaoliang,
Vettoretti Guido,
Peltier W. Richard,
Zhang Guang Jun
Publication year - 2007
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 - 10.1029/2007gl030637
Subject(s) - madden–julian oscillation , climatology , oscillation (cell signaling) , convection , gcm transcription factors , southern oscillation , climate model , el niño southern oscillation , general circulation model , atmosphere (unit) , forcing (mathematics) , environmental science , atmospheric sciences , meteorology , geology , physics , climate change , chemistry , oceanography , biochemistry
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.