Abstract
The method proposed by Stommel and Schott ( Deep-Sea Research, 24, 325–329, 1977) to calculate absolute currents from density data is extended to take into account the effect of vertical mixing. It is shown that a reasonable amount of vertical mixing suffices to remove a depth tendency in the results for the absolute currents that Schott and Stommel ( Deep-Sea Research, 25, 961–1010, 1978) found in an application of the immiscible method to data sets from different oceans. A mixing term with different analytical profiles of the diffusion coefficient was also introduced into the model fit but only some of the results were significant. The major problem was that the necessary higher-order vertical derivatives of the density profile could not be determined well enough from the hydrographic station data. A grid of STD (salinity-temperature-depth) stations is needed to clarify further the situation.
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