The thermohaline circulation, also described as the ‘great ocean conveyor’ is one of the most significant control knobs of the climate system.
First, I’ll cut some slack over the discrepancies, like which side of Madagascar and which side of New Zealand the warm surface currents flow. What is most interesting is that much of the warm circulation is in the contrary direction to the prevailing winds for the area. If prevailing winds do not influence surface flow then climate science has some more thinking to do.
Ocean surface currents are driven by prevailing winds and are deflected by continents.
The prevailing winds represented by ocean surface currents