How does the ocean affect the weather?
Heat transfers readily from ocean to atmosphere, and much of the sun's radiation is absorbed by the ocean. In fact, the upper ten feet (3 metres) of the ocean holds as much heat as the entire atmosphere. Ocean currents move warm surface water away from the tropics and return cold water to them via the ocean floor in a conveyer system. As the surface currents flow, they release heat into the environment, and thereby affect our weather. (YT)