Relationships Between the Eastward Propagation of the Madden‐Julian Oscillation and Its Circulation Structure

The circulation associated with convection of the Madden-Julian Oscillation (MJO) has been suggested to have an impact on its propagation by a number previous studies. This contains both flanking Rossby waves rear and Kelvin wave leading convective center. In this study, individual MJO envelopes from 40-year database are tracked, technique scale zonal wavelength is employed, statistical methods used assess how pattern might eastward downstream. Results suggest that continuous favored when strong present east convection, indicated easterly wind anomaly negative geopotential height anomaly. addition known significance having anomalies, results study highlight existence important supporting moistening propagation. It found importance signal depends region located over. enhances support MJO, mainly through meridional moisture advection due coupling between Rossby-like disturbances active convection. roles boundary layer convergence vertical also discussed.