Известия Российской академии наук. Физика атмосферы и океанаИзвестия Российской академии наук. Физика атмосферы и океана0002-3515The Russian Academy of Sciences1883210.31857/S0002-3515556171-181Research ArticleOn the mechanism of a positive feedback in long-term variations of the convergence of oceanic and atmospheric heat fluxes, and the ice cover in the Barents seaKalavichchiK. A.katrina.calavicci@mail.ruBashmachnikovI. L.igorb1969@mail.ruSaint Petersburg State University211220195561711812112201921122019Copyright © 2019, Russian academy of sciences2019<p>This paper presents a study the interannual variability of the convergence oceanic and atmospheric advective heat fluxes in the Barents Sea region for 19932014, using combined in situ, satellite and numerical model-based oceanic and atmospheric data-sets: ARMOR-3D and ERA-Interim. On inter-decadal scales, the leading role of convergence of the oceanic heat flux, and on interannual scale of atmospheric heat flux are demonstrated to play the leading role in variations of the sea-ice area of the Barents Sea. The inter-decadal and the interannual variations of the oceanic heat flux are found to be mainly shaped by variations of the current velocity. In the long-term tendencies the current velocity is responsible for about 70% of the increase in the oceanic heat flux, mainly due to a higher transport in the North Cape Current. Variations in transport of the North Cape current and of the Return current are governed by variations in the meridional gradients of the zonal wind speed, in turn, caused by the stronger oceanic heat transport into the Barents sea and by the consequent melting of the sea-ice. 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