This phenomenon is thought to occur due to equatorially trapped Kelvin and Rossby waves in the troposphere, which couple to deep atmospheric convection, resulting in an eastward moving wind system that strongly influences the monsoon cycle.
Sperber and Kim proposed the use of a simple metric for evaluating models of this phenomenon which examines the lag correlation structure of the two principal components extracted from bandpass-filtered outgoing longwave radiation data. This phenomenon is sometimes confused with synoptic-scale westerly wind bursts, and its interaction with oceanic water results in the fluctuation of the temperature of the mixed layer. (*) This phenomenon consists of an "active" phase and a "suppressed" phase, which are connected by zonal circulations. This phenomenon is thought to occur due to equatorially trapped Kelvin and Rossby waves in the troposphere, which couple to deep atmospheric convection, resulting in an eastward moving wind system that strongly influences the monsoon cycle. For 10 points, identify this tropical disturbance that moves east around the tropics with a 30 to 60 day cycle named for its two discoverers.
Sperber and Kim proposed the use of a simple metric for evaluating models of this phenomenon which examines the lag correlation structure of the two principal components extracted from bandpass-filtered outgoing longwave radiation data.
Madden-Julian oscillation [accept MJO or 30-60 day oscillation before mention or intraseasonal oscillation]