| THE DYNAMIC EFFECTS OF A FINITE DEPTH AMBIENT FLUID ON BOTTOM EDDY |
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| 作者姓名： | 吴德星 冯士笮 |
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| 作者单位： | Institute of Physical Oceanograpny，ucean University of Qingdao，Qingdao 266003 |
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| 基金项目： | This research was supported by NSFC(No.49276267) |
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| 摘 要： | Scaling analysis shows that if o(ε~2, β_1ε, γε) ~o (δ), frontal geostrophic dynamics governs the behav-ior of an isolated bottom eddy in a finite depth ambient fluid; and that the ambient flow induced bybottom eddy migration satisfies quasi-geostrophic dynamics. This two layer model includes the impor-tant processes of advection of bottom eddy due to ambient flow, baroclinic instability, and form dragintroduced by Rossby waves. The numerical results show that the three processes enhance theinstability and alter the migration speed of the bottom eddy, and that the form drag induces asignificant meridional drift of the eddy.
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| 收稿时间： | 6 January 1994 |
| 修稿时间： | 1 November 1994 |
The dynamic effects of a finite depth ambient fluid on bottom eddy |
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| Wu De-xing,Feng Shi-zuo.THE DYNAMIC EFFECTS OF A FINITE DEPTH AMBIENT FLUID ON BOTTOM EDDY[J].Chinese Journal of Oceanology and Limnology,1995,13(2):124-133. |
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| Authors: | Wu De-xing Feng Shi-zuo |
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| Institution: | (1) Institute of Physical Oceanography, Ocean University of Qingdao, 266003 Qingdao |
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| Abstract: | Scaling analysis shows that ifo(ε2,β1ε,γ)∼o(δ), frontal geostrophic dynamics governs the behavior of an isolated bottom eddy in a finite depth ambient fluid; and that
the ambient flow induced by bottom eddy migration satisfies quasi-geostrophic dynamics. This two layer model includes the
important processes of advection of bottom eddy due to ambient flow, baroclinic instability, and form drag introduced by Rossby
waves. The numerical results show that the three processes enhance the instability and alter the migration speed of the bottom
eddy, and that the form drag induces a significant meridional drift of the eddy.
This research was supported by NSFC. (No. 49276267) |
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| Keywords: | frontal geostrophic dynamics quasi-geostrophic dynamics baroclinic instability migration speed |
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