Contrasting Madden–Julian Oscillation activity during various stages of EP and CP El Niños

This study revisits the relations between Madden–Julian Oscillation (MJO) and El Niño that is classified as eastern Pacific (EP) and central Pacific (CP) types. During an EP‐type event that produces lasting dry conditions in the Maritime Continent and western Pacific, the MJO activity is weak especially in its 4th–6th phases as a strong response. In contrast during CP‐type episodes, the MJO exhibits notably enhanced and suppressed amplitudes in its different phases. The low‐level westerly wind anomalies of enhanced MJO impact the CP‐type El Niño more than vice versa.