A. N. Lukyanova1, A. V. Bagaev1, T. V. Plastun1, N. V. Markova1, V. B. Zalesny2, V. A. Ivanov1
1 Marine Hydrophysical Institute of RAS, Sevastopol, Russia
2 Institute of Numerical Mathematics of RAS, Moscow, Russia
Abstract
The present work analyses the numerical experiments on the climatic circulation modeling run with a thermodynamic model of the Black Sea and the Sea of Azov developed by the Institute of Numerical Mathematics, RAS (INM). Maps of currents and vertical sections of temperature fields are given. The model is shown to reproduce the 13main elements of water circulation well, while their vertical thermohaline structure agrees with the data from long-term observations.
The database query from Marine Hydrophysical Institute RAS (MHI) and results of climatic experiment with numerical models of INM and MHI are generalized and transferred to a unified grid. Information on amplitudes and directions of currents at 500, 750 and 1000 m is analyzed. The currents in question are characterized by high variance for averaged amplitudes and an unstable change of directions, which is most evident for the stations over continental slopes. The INM model is more accurate (compared to the database) when reproducing the currents direction, but, for many stations, it underscores the speed amplitudes. This might be explained by insufficient resolution for the Black Sea bathymetry description, relatively low energy for the surface forcing, and absence of climatic temperature and salinity profiles assimilation.
Keywords
numerical modeling, deep sea circulation, data base, the Black Sea