The impact of surface boundary conditions on the formation of the Black Sea haline stratification from the numerical simulations

Abstract

Following a series of studies of the formation of the Black Sea haline stratification by various initial and boundary conditions, three numerical experiments were performed. For this purpose, the previously performed experiment with a spatially uniform salinity of 12 %º was chosen (experiment 1). New simulations were carried out with heat fluxes on the surface (experiment 2) obtained in the department of VAO FSBSI FRC MHI. In addition to heat fluxes, a constant cyclonic tangential wind stress curl (experiment 3) and a tangential wind stress curl with a seasonal variation (experiment 4) were also set. The results of numerical simulations show that in all experiments where heat fluxes were set on the surface, the upper mixed layer appears. The depth of the halocline does not change and is at about 20 m. Also in all experiments the relation between the southward and northward currents are close. Water exchange through the southward current is almost two times greater than that through the northward.