CYCLONIC ACTIVITY OVER THE NORTH-ATLANTIC AND EL-NINO IN 1980S

Analysis of cyclonic activity in moderate latitudes of the North Atlan tic and the adjacent land in 1980-ies using the proposed index Cr reve als a large-scale fluctuation connected with quasiregular variation of other factors. Among them are intensity of cyclonic activity in the t ropics, temperature and salinity variation in the North Atlantic curre nt system, sea-ice area variations in certain regions. Analysis of all these phenomena complex shows the relationship the El Nino-Southern O scillation. Some evidence is given that the discussed complex of the i nterrelated fluctuations is characteristic not only of the given decad e bur also of other time intervals.