¥Drag from wind exerts a force on the
ocean surface in
the same direction as the wind.
¥Currents of
upper ocean are due to wind.
¥Tend to flow
in the direction of prevailing wind.
¥Poleward currents are warm; equatorward currents
are cold.
¥Thus, oceans transport heat from the
tropics to the poles,
about the same amount of heat as the wind.