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Phase locking between atmospheric convectively coupled equatorial Kelvin waves and the diurnal cycle of precipitation over the Maritime Continent

We have shown a systematic impact on CCKWs over the Maritime Continent that depends on the time of day of their arrival. CCKWs that pass a base point over the Indian Ocean at 90°E are in phase with the diurnal cycle over Sumatra and Borneo. Compared with CCKWs that arrive 6 h earlier, these favored waves have a precipitation signal that is up to 3 times larger, and they are 40% more likely to successfully traverse the Maritime Continent. These scale interactions between the diurnal cycle and CCKWs are an example of rectification in the climate system.

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