Peering into the microphysics of the Madden-Julian Oscillation

The onset of the active phase of the Madden-Julian Oscillation (MJO) is marked by the formation of a region of deep convection and enhanced precipitation over the Indian Ocean. Generally persisting from 30 to 60 days as it progresses slowly eastward, the MJO consists of wet active phases alternating with suppressed periods of lower rainfall and reduced storm activity.