Application of a two-way nested model to the seamount problem |
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| Authors: | Hisashi?Hukuda Email author" target="_blank">Xinyu?GuoEmail author |
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| Institution: | (1) Frontier Research System for Global Change, Showamachi, Kanazawa-ku, 236-0001 Yokohama, Japan;(2) Center for Marine Environmental Studies, Ehime University, Bunkyo-cho, 790-8577 Matsuyama, Japan |
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| Abstract: | A two-way nested model has been constructed and applied to the idealized ocean where a uniform mean flow impinges on the isolated
Gaussian-shaped seamount and produces two eddies (cold and warm) in the depths. The performance of the nested model has been
evaluated subjectively and objectively. Both subjective and objective analyses confirm the traditional view that the nested
model can well capture the performance of isolated eddies. Objective analysis, however, reveals some quantitatively important
features of a two-way nested model. One is penetration of improved features into the coarse domain and another is the deterioration
of mean flow field inside the nested area, neither of which is clear from subjective analysis. With successful application
of two-way nested model to the seamount problem, we expect that such a nested model will also be applicable to other oceanic
phenomena, particularly to some coastal problems whose time scale is short and where the topographic effects are dominant. |
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| Keywords: | Two-way nested model flux-conservation seamount problem eddy behind the seamount objective analysis sigma coordinate model message-passing model |
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