Numerical Simulation of the Arctic Ocean Circulation

Abstract
The circulation of the Arctic Ocean and Greenland Sea is simulated using the 1969 numerical model of Bryan and Cox. The coastline and bottom topography of the region are resolved by a 110 km horizontal grid spacing and by 14 vertical levels. The transfers of mass, heat and momentum at the ocean surface and at open lateral boundaries are specified from observations. In particular, the pattern of wind stress is obtained using a map of mean annual atmospheric pressure; and a scalar multiplier is applied to account for the nonlinear dependence of stress on wind speed. Three experiments with different values of this scalar multiplier are run to simulate the effect of high, medium and low wind stress. The first experiment is carried out for the combined Arctic Ocean and Greenland Sea, while the other two experiments are run for the Arctic Ocean only. Many of the observed features of the Arctic circulation are reproduced by the simulations. The Greenland Sea exhibits cyclonic flow at all levels and deep... Abstract The circulation of the Arctic Ocean and Greenland Sea is simulated using the 1969 numerical model of Bryan and Cox. The coastline and bottom topography of the region are resolved by a 110 km horizontal grid spacing and by 14 vertical levels. The transfers of mass, heat and momentum at the ocean surface and at open lateral boundaries are specified from observations. In particular, the pattern of wind stress is obtained using a map of mean annual atmospheric pressure; and a scalar multiplier is applied to account for the nonlinear dependence of stress on wind speed. Three experiments with different values of this scalar multiplier are run to simulate the effect of high, medium and low wind stress. The first experiment is carried out for the combined Arctic Ocean and Greenland Sea, while the other two experiments are run for the Arctic Ocean only. Many of the observed features of the Arctic circulation are reproduced by the simulations. The Greenland Sea exhibits cyclonic flow at all levels and deep...