Sensivity study of the warm Atlantic layer to diffusion parametrization in the Arctic modeling

In this paper, we study the sensivity of the numerical model of the Arctic-North Atlantic Ocean to the way of the diffusion parametrization: standard horizontal/vertical diffusion (HOR), isopycnal mixing scheme, with the Cox approach (ISO); and the Gent-McWilliams parametrization (GM). As a result of numerical experiments we have obtained more intensive and distinct flows observed in the picture of the Arctic circulation in the ISO model release. It is also shown that the replacement of the standard horizontal/vertical diffusion by the isopycnal diffusion gives rise to a larger heat inflow to the Arctic Ocean through the Fram Strait.