INDIRECT ESTIMATE OF FLUXES BETWEEN BOUNDARY CURRENT AND DEEP BASINS IN THE NORDIC SEAS: HEAT AND FRESHWATER BUDGETS
In the Nordic Seas the inflow of warm and saline Atlantic waters from the south is mainly transformed into dense deep and intermediate waters. Part of these deeper water masses eventually flow back into the Subpolar North Atlantic via the overflows across the Greenland-Scotland-Ridge. The swift boundary current preferentially acts as a conveyer for in- and outflowing water. In the deep basins in the interior the transformation mainly occurs. The lateral exchange between the two components is supposed to take place by eddies, which are difficult to detect due to their small diameters. Hence in this study the lateral exchange is estimated in an indirect way. On the basis of hydrographic data from profiling floats and sea surface flux data from a meteorological reanalysis heat and freshwater budgets are established. The lateral exchange between basins and boundary current is given by the residual of the two known components and is identified with the contribution of the deep basins to the transformation. The budgets allow calculating the relative importance of the deep basins to the total water mass transformation.
Latarius, K., Alfred-Wegener-Institut für Polar- und Meeresforschung, Germany, firstname.lastname@example.org
Quadfasel, D., Institut für Meereskunde, KlimaCampus, University of Hamburg, Germany, email@example.com
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