Study of the Overflow Transport of the Nordic Sea

Changes in the climate system over recent decades have had profound impacts on mean state and variability of ocean circulation, while Nordic Sea overflow has remained stable volume transport during last two decades. The changes flux depend pressure difference at depth outlet both sides Greenland-Scotland Ridge (GSR). Combining satellite altimeter data reanalysis hydrological data, analysis found that barotropic baroclinic GSR a good negative correlation from 1993 to 2015. Both are caused by properties upper water, total no trend change. weakening deep convection can only change temperature salt structure Sea, but cannot reduce mass water column. Therefore, drives overflow. storage is decreasing, which may be reduction local production constant flux. When interface body close or below depth, likely greatly slow down even experience hiatus future, deserves more attention.