Does cold water ever sink in the oceans?
Yes, it does. Wherever there are differences in temperature in the water there will be rising and sinking of the water. The movements of the currents in the deep ocean are very complicated because they are generated by currents on the surface. The currents on the surface are generated by the way the earth turns and the winds on the ocean surface. However there is one particular place where cold water sinks. This occurs in the Antarctic Ocean. In winter, ice, called pack ice, forms on the surface of the ocean. Under the pack ice the very cold water sinks very deep and enters the lower parts of the Atlantic, Indian and Pacific Oceans.
