Notes on linear and nonlinear barotropic flows in a polar circular basin |
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| Authors: | Satoshi Sakai Shiro Imawaki |
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| Institution: | (1) Geophysical Institute, Kyoto University, 606 Kyoto, Japan;(2) Present address: Institute of Earth Science, Kyoto University, 606 Kyoto, Japan;(3) Geophysical Institute, Kyoto University, 606 Kyoto, Japan |
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| Abstract: | Barotropic flows in a circular ocean are studied. Flows are driven by an inflow and an outflow through openings at the circumference. A linear, steady state solution is interpreted in terms of dissipating planetary waves. A weakly nonlinear, steady state solution is obtained numerically. It differs remarkably from the linear solution; an intense anticyclonic polar gyre extending over the whole basin is formed. The nonlinear term is essential to the gyre and can not be neglected, although the Rossby number is small. |
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