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The Adriatic Sea tidal energy budget: energy fluxes and dissipation sinks

Present work aims to resolve spatial distribution of tidal energy fluxes, and to quantify various sources and sink terms. The analysis is performed for all the most important constituents (M2, S2, K2, N2, K1, P1, and O1). Baseline results of our study (elaborated with further experiments) indicate that the tidal energy flux of the seven major constituents through the open boundary (located at the Otranto strait) amounts to 29.43 MW. The M2 constituent exhibits the largest power contribution (about 60.3%), the K1 contributing the next 21.4%, the S2 16.3%, whereas the remaining four constituents con-tribute only 2%. Predictably, the loss of barotropic tidal energy is dominated by bottom friction. Most of the semidiurnal tidal energy is dissipated in the northern Adriatic (between 76.5% and 81.5% depending of constituent), while only one third of the diurnal energy is dissipated there. Most of the diurnal tidal energy (about 55%), and only about one fifth of the semidiurnal, is dissipated in the middle Adriatic. In the southern Adriatic only a minor part of the overall tidal energy is dissipated (about 0.5% of semidiurnal and 12% - 15% of diurnal). The K1 energy flux is particularly pronounced at the border between the middle and southern Adriatic characterized by steep bathymetry slope, pronounced frictional dissipation, and larger velocities, conductive to generation of diurnal shelf waves and internal tides.

tides; energy dissipation; numerical model; Adriatic Sea

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