what is an under sea waterfall?

Answer 1

Between Greenland and the Faroe Islands there is an undersea waterfall thirty times the size of the River Amazon. The water cascades over a submarine ridge, then rumbles down the ocean floor all the way to the Cape of Good Hope. This current is a result of the high salt content of the surface of the North Atlantic. The salty water, being denser than the water underneath, sinks and starts to travel. The global circulation system this flow initiates ensures that warm water travels back from the Caribbean to western Europe. Were the North Atlantic to become less salty, in other words, the currents keeping Europe warm would slacken.

Eight and a half thousand years ago, an ice shelf damming two vast glacial lakes in North America exploded. The lakewater rushed through the Hudson Strait, mingling with the salty waters of the Atlantic. The result was a 200-year ice age, during which humans became extinct in northern Europe. In Greenland today, just to the north of the great Atlantic waterfall, scores of glaciers and ice-dammed fjords are beginning to melt. Over the past 20 years, an area of Arctic sea ice the size of Texas has disappeared. As the ice retreats, the pole becomes darker, absorbing more heat and accelarating the melting. The North Atlantic could be about to become significantly wetter.

Answer 2

Having no previous knowledge of the term "undersea waterfall" I would assume that it would be in reference to an undersea current that would be in an geologic formation that drops in elevation toward the seabed, much like the Australian Current and the Gulf Stream are refered to as "underwater rivers".

Answer 3

Hi. A current that happens to go down a slope.

Answer 4

i don't think that's possible?