Ancient flood brought Gulf Stream to a halt

http://environment.newscientist.com/article/dn13013-ancient-flood-brought-gulf-stream-to-a-halt.html

Summary: This was the biggest climate event of the last 10,000 years. 8,000 years ago a huge glacial lake in Canada burst and a lot of freshwater rushed into the North Atlantic and cooled for over hundreds of years. Researchers are sure that this shut down the Gulf Stream.

What are some ways this phenomenon could be stopped? Find out how much freshwater is needed to stop the circulation
Is there anything you could do to contribute to the reversal
no
List three things you learned from this article in your own words.
1.) The Gulf Stream keeps us warm
2.)Lake Agassize formed from the last ice age
3.) the film The Day After Tomorrow is based on this event

What impact would the continuance of these process have on the biosphere? the world would get colder and we will have another ice age