Cold, salty seawater can sink through the ocean
Seawater gets heavier when it becomes colder or saltier. In places where surface water becomes cold and salty enough, it sinks beneath the water around it and helps drive deep ocean currents.
Seawater gets heavier when it becomes colder or saltier. In places where surface water becomes cold and salty enough, it sinks beneath the water around it and helps drive deep ocean currents.