ADJUSTMENT OF THE BLACK-SEA GEOPHYSICAL F IELDS TO A NEW NUMERICAL-MODEL - INITIAL-STAGE

In the quasi-geostrophic approximation, a numerical nonlinear model of baroclinic circulation in a closed basin with a flat bottom is develo ped. The difference-differential scheme of the model offers the comple te approximation. On the basis of this approximation, a numerical expe riment was performed to study the response to a wind forcing under con ditions of the Black Sea. It is shown that, at the initial stage, the adjustment of hydrophysical fields to boundary conditions occurs due t o the barotropic and first baroclinic normal modes of the basin. Oscil lations with periods of 43 and 83 days were observed in a quasi-period ic state. The amplitude-phase characteristics of the oscillations are analyzed.