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The propagation of freshwater anomalies from Siberian rivers in the Arctic Ocean in the 21st century has been simulated using a model developed in Institute of Computational Mathematics and Mathematical Geophysics, Russian Academy of Sciences (ICMMG RAS), based on the output of the ICM RAS model and scenario RPC 8.5, project CMIP-5 IPCC. River runoff has been calculated using a linear reservoir model with 1/3-degree resolution, including nine major drainage basins in Siberia. [ABSTRACT FROM AUTHOR]

Variations in hydrophysical parameters in the Arctic Ocean and the North Atlantic are studied on the basis of numerical simulation with the use of an ocean circulation model (including ice formation and drift). The main circulation and ice-drift modes have been ascertained depending on atmospheric cycles. The possibilities of the parameterization of intermediate and deep water formation in numerical models of polar ocean dynamics are considered. The effect of the interannual variability of the discharge of Siberian rivers on the distribution and propagation of fresh water in this region are estimated from numerical experiments. The simulation results of the propagation of the dissolved methane from Siberian rivers are presented. [ABSTRACT FROM AUTHOR]