Published in Marine Hydrophysical Journal . — 2012. — No2 — C. 37-49. The regional climate of the Black Sea region is largely due to the influence of the Black Sea water basin. However, the detailed qualitative and quantitative characteristics of this influence were not known until recently. To highlight the features introduced by the Black Sea into the regional climate, a numerical experiment was conducted and described with a regional model of atmospheric circulation. The results confirm that the main effect is the generation of mesoscale circulation over the sea basin, associated with the contrasts of buoyancy flows between the sea and the surrounding land. In addition, the sea makes significant disturbances in the regional distribution of precipitation - between April and June, precipitation decreases by 1.5 - 2 times, while from August to the end of the year there is an increase in precipitation. Keywords: Black Sea, climate, climate modeling.