What controls the pathways of the Labrador Present?

Modifications to the movement of the Labrador Present alongside the coast of Newfoundland and Labrador to Nova Scotia are resulting in sudden warmings or drops within the oxygen ranges of the waters in a number of areas together with the St. Lawrence Gulf and Estuary. This variation has dire penalties for marine ecosystems and fisheries. To raised predict what might occur sooner or later, researchers got down to reply the query: what controls the pathway of the Labrador Present?