MJO Model Forecasts Share this page Madden-Julian Oscillation (MJO) The Madden–Julian Oscillation (MJO) is the largest element of the intraseasonal (30–90 days) variability in the tropical atmosphere. It is a large-scale coupling between atmospheric circulation and tropical deep convection. Rather than being a standing pattern (like ENSO) it is a traveling pattern, propagating eastwards at … Continue reading MJO Model Forecasts