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GEOPHYSICAL RESEARCH LETTERS,
VOL. 34,
L16823,
6 PP., 2007
doi:10.1029/2007GL030637
Impact of a modified convective scheme on the Madden-Julian Oscillation and El Niño–Southern Oscillation in a coupled climate model
Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa, USA
Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa, USA
Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa, USA
Department of Physics, University of Toronto, Toronto, Ontario, Canada
Department of Physics, University of Toronto, Toronto, Ontario, Canada
Scripps Institution of Oceanography, La Jolla, California, USA
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.
Received 9 May 2007; accepted 3 August 2007; published 30 August 2007.
Citation: (2007), Impact of a modified convective scheme on the Madden-Julian Oscillation and El Niño–Southern Oscillation in a coupled climate model, Geophys. Res. Lett., 34, L16823, doi:10.1029/2007GL030637.
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