finally, seafloor topography and the shape of the ocean's basins impact both surface and deep water currents as they retrict areas where water can move and funnel it into another

The Importance of oceans currents
because oceans currents circulate water worldwide, they have significant impact on the movement of energy and moisture between the oceans and the atmosphere. As a result they are inportant to the world's weather. the Gulf stream for example is a warm currents that originates in the Gulf of mexico and moves north toward europe since it is full of warm water, the sea surface temperatures are warm, which keeps places like europe warmer than other areas at similar latitudes.

The humboldt current is another example of currents thats affects weather when this cold current is normally presents off the coast of chile and peru, it creates extremely productive waters and keeps the coast cool and northern. chile arid however, when it becomes disrupted, chiles climate is alterd and it is belived that nlro plays a role in its disturbance