海洋深層水形成に伴う熱塩深層循環と渦成深層循環

概要

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Simple numerical experiments were performed on the thermohaline and the eddy-induced abyssal circulations induced by deeper water formation. Both thermohaline forcing and eddy-induced forcing generate mean clockwise circulation along the slope in a bottom layer if the bottom water is formed. On the other hand, if deep convection does not reach the bottom layer and hence water in the intermediate layer rather than the bottom layer is formed, thermohaline forcing is not able to generate significant mean circulation in the bottom layer while eddy-induced forcing can generate it. This indicates that eddy-induced forcing generates intense bottom currents observed in the Japan Sea and the Labrador Sea where the bottom water is not formed. The present study also investigates the generation mechanism of eddy-induced abyssal circulation.59
Research Institute for Applied Mechanics, Kyushu University,九州大学応用力学研究所の論文