Question: Which Norse explorer from Iceland led the Viking expansion where Vikings sailed the North Atlantic and reached south to North Africa and Russia?
Sentence (from "North Atlantic Deep Water"): In the conveyor belt model of thermohaline circulation of the world's oceans, the sinking of NADW pulls the waters of the North Atlantic drift northward; however, this is almost certainly an oversimplification of the actual relationship between NADW formation and the strength of the Gulf Stream/North Atlantic drift.
Relevant evidence: No