Scientific publications

Residual tidal phenomena (residual tidal currents and residual tidal sea level) due to energy exchange from the basic harmonics to the low- and near-zero area of the spectrum, have been poorly investigated in the White Sea until now. The mechanisms of residual tidal phenomena generations are related to four nonlinear effect types: convective nonlinearity, friction nonlinearity, shallow nonlinearity and nonlinearity of boundary conditions. We carried out numerical experiments with a nonlinear hydrodynamic model to estimate the contributions of (shallow, friction and convective) nonlinearities to the White Sea residual tidal phenomena, using a "consecutive realization" technique. For physical interpretation of numerical experiment results by means of "Reynolds averages" of motion and continuity equations, the dependency of residual tidal level and residual tidal currents was received from statistical parameters of the tidal currents (variance, covariation of level and currents, covariation of zonal and meridian components of current). These results will enhance the knowledge of tidal phenomena in the White Sea, and can be used for ecology and fisheries research.