Numerical studies of the internal waves interaction with the Black Sea shelf topography at spring-summer stratification

Abstract

This work investigates the regional specifics of the appearance and propagation of internal waves at the shelf of the Black Sea. The parameters of horizontal inhomogeneity associated with changes in the bottom relief and density of seawater that lead to instability and destruction of internal waves are studied. The numerical experiments for the spring and summer seasons on transects normal to the coast are conducted using data of temperature and salinity from the Bank of oceanographic data of the Marine Hydrophysical Institute of RAS. The article touches upon the actual theme of adaptation of satellite images obtained from open sources when solving oceanographic problems. The result of the processing of remote sensing data was information about the speeds and wavelengths for the observed phenomena. These values are used to recover the depth of the seasonal pycnocline within a two-layer approximation of the vertical density structure. For different bottom slopes and seasonal profiles of the buoyancy frequency, sites are determined where the transition from supercritical to critical or subcritical conditions is possible in the region of the Crimean coast.