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Modeling the circulation of the intermediate layer in the Sea of Okhotsk

Recently, the Sea of Okhotsk has been recognized as a primary iron source region to the northwestern Pacific (Nishioka et al., 2007). Cold and dense water, which is referred to as Dense Shelf Water (DSW), is formed as a result of brine rejection from sea ice on the northwestern shelf in the Sea of Okhotsk. Iron, together with other chemical particles, is considered to be incorporated into DSW through, for example, tidal mixing (Nakatsuka et al., 2004). DSW, including iron, is transported southward by the East Sakhalin Current in the intermediate layer off Sakhalin, and flows out into the Pacific through the Kuril straits. Thus iron is supplied to the northwestern Pacific.