The MJO From CMIP5 to CMIP6: Perspectives From Tracking MJO Precipitation

Reproducing the Madden-Julian Oscillation (MJO) remains a challenge in many climate models. This study compares MJO simulation skills 17 pairs of Coupled Model Intercomparison Project Phase 5 (CMIP5) and 6 (CMIP6) simulations. Generally, characteristics are better reproduced CMIP6, their inter-model spreads obviously reduced CMIP6. However, most CMIP6 models still underestimate frequency initiation over Indian Ocean amplitude, exaggerate barrier effect Maritime Continent (MC) on propagation. Models with lower CMIP5 versions show improvements while other tend to degraded The possible reasons for apparent simulations from six was further explored. It found that enhanced land precipitation MC prior convection entering this region is more obvious