Daily 1degx1deg estimates based on retrieval algorithm of Liu and Curry, 1992. The seasonal cycle over the western equatorial Pacific is relatively feeble. This contrasts other regions of the tropics and subtropics where the first harmonic of the annual cycle is relatively large. The magnitude of precipitation by seasonal average also demonstrates the intensity of precipitation over the Warm Pool. It is a dominant feature in mean tropical precipitation throughout the year.
Mean winds are slight easterly in the boreal summer and slight westerly in boreal winter.
Precipitation over the area is intense in every season and skies in the region are continually cloudy. Seasonal mean moisture transports by the large-scale circulation are marked by considerable trade wind advection of moisture across the central pacific, north west to the Philippines. As mean winds over the Aratura Sea and Coral Sea are weak, little moisture is transported into the south equatorial Warm Pool. A zonal profile of the climatological mean winds reveals a structure commonly referred to as the Walker Cell. Above the warm SSTs of the WEP, ascent and deep convection dominates.