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

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

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416823w&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 16, CiteID L16823

Physics

17

Global Change: Global Climate Models (3337, 4928), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513), Global Change: Atmosphere (0315, 0325), Global Change: Climate Dynamics (0429, 3309), Global Change: Oceans (1616, 3305, 4215, 4513)

Scientific paper

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.

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