A LINK BETWEEN THE VARIABILITY OF ATMOSPHERIC CIRCULATION CHARACTERISTICS IN THE AZOV-BLACK SEA REGION AND THE INDICES OF THE MAIN MODES OF LARGE-SCALE ATMOSPHERIC CIRCULATION IN THE EURO-ATLANTIC SECTOR

The results of studying the variability of the NAO, EA, POL, EA/WR, and SCA indices characterizing the large-scale atmospheric circulation in the Atlantic-Eurasian sector and regional atmospheric circulation indicators (surface air pressure field expansion factors in the Azov-Black Sea region) over the period 1960-2021 are presented. A comparative analysis of the variability during 1960-1989 and 1990-2021 has been performed. It has been found that the large-scale and regional indices are statistically significantly connected in terms of seasonal, interannual, and long-term variability. Periods of the resonant and compensating influence of large-scale processes on the atmospheric circulation over the Black Sea and the Sea of Azov have been revealed. The intraannual variations in NAO, POL, and SCA in 1990-2021 were almost opposite to those in 1960-1989. The differences were particularly great in December-June. The seasonal trends in the regional indices were preserved, but there were changes in the values, which are especially significant in December-April.