Arctic sea ice to start the convection?

U.S. scientists found that: long, 15 years later, the Labrador Sea in the last year (2007-2008) have a sea of deep winter convection, the formation of the North Atlantic deep water. They conjecture is likely to be in the summer of 2007, from the collapse of a large number of Arctic sea ice caused by the results of the study published in the journal Nature Geoscience. 

 Polar region of the North Atlantic is the world's climate system, an important aspect, the surface water in this release of heat, density has become larger, and the deep sea water through a mixture of continuous, convection, and has gradually formed the North Atlantic Deep Water, to become Global sea important thrust belt transmission. As a result of global warming, scientists expected the surface water temperature increased, and the Arctic melting dispelled a lot of fresh water, will be weakened or even the termination of deep sea water convection, have an impact on the global climate is just sooner or later. The latest observations show that: do not imagine that simple. 

 Woods Hole Research Institute of the U.S. marine scientists Kjetil ge-led research team analyzed the Labrador Sea and the Irminger sea float observational data, the ball can be measured from the surface to the depth of 2000m of water temperature, They found that in the 2007-2008 winter Labrador again deep under the sea surface mixed water layer, which on behalf of the North Atlantic deep water formation, and they found that the formation of deep water with the sea ice off the relationship can not. Scientists speculate: the previous year (2007) summer from the collapse of the Arctic sea ice, cut off from the northern Labrador sea and sea-surface winds from the West biting winter wind of direct contact, so the cold wind across the North Sea, straight sweep pull warmer Sea surface is not caused the water temperature here, releasing heat, the density of large and sink, and under the deep sea water mixed convection significant, so 15 years after the recurrence of the North Atlantic deep water. 

 Thus the idea that global warming will have to stop the deep convection, an over-simplistic idea. Understanding of sea water, ice and atmospheric feedback mechanisms between the complex, will be the polar regions we understand that the key to climate change,