The big winds and water currents in the Pacific Ocean

First of all I, these huge wind and water systems are not stable. There exists a standard pattern, but with almost continuous deviations. But you have to start from a template and then possibly describe the differences as you go.

The Earth's rotation creates the dominant / most common wind direction in the tropics from east to west and leads the tropical ocean currents westward. In the Pacific we find North and South Equatorial Current leading surface waters westward. However, approximately 5-10 degrees north of the equator in a belt that is relatively calm, the Equatorial maelstrom travels east in a narrow band. The current extends over the entire ocean from the Philippines to Colombia.

The explanation for this phenomenon is to say the least extraordinary. When the easterly trade winds drive the warm surface waters westward, a sort of flat slope of warm water is formed which is highest in the west. The trade winds are holding back this slope so that water can not slide back "downhill". But there is a narrow gap in the prevailing east wind, where the winds are weak and changeable, and there can the water freely flow downhill to the east.