 Geological evidence for such an event is not fully secure, but recent work has identified a pathway along the Mackenzie River that would have spilled fresh water into the Arctic and thence into the Atlantic.The global climate would then have become locked into the new state until freezing removed the fresh water "lid" from the North Atlantic.However, simulations indicated that a one-time-flood could not likely cause the new state to be locked for 1000 years.