| 海洋中长生命反气旋涡在地形上的演变以及涡旋的合并现象 |
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| 引用本文： | 罗德海,卢燕.海洋中长生命反气旋涡在地形上的演变以及涡旋的合并现象[J].海洋与湖沼,2000,31(4):363-369. |
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| 作者姓名： | 罗德海 卢燕 |
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| 作者单位： | 青岛海洋大学海洋环境学院,青岛,266003 |
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| 基金项目： | 青岛海洋大学青年教师基金资助项目 |
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| 摘 要： | 通过对海洋中长生命反气旋涡在Ｇａｕｓｓ型孤立地形上演变的研究，发现地形对长生命反气旋涡的发展和传播有相当重要的影响。在无地形作用的情况下，仅有反气旋涡能够存在于向西的均匀基流中，这个涡是长生命的，并且在西移过程中有明显的向西倾斜。然而当其上游存在一个孤立地形时，可以发现这个涡有一个向东的倾斜，它的强度将增强且向西的移速会增加，其规迹象陀螺的运动。另一方面，当两个强度相同的反气旋涡同时存在时，这两个
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| 关 键 词： | 海洋涡旋 反气旋涡 孤立地形 演变 合并 |
| 收稿时间： | 1998/3/25 0:00:00 |
| 修稿时间： | 1998-03-25 |
THE EVOLUTION OF LONG-LIVED ANTICYCLONIC VORTICES OVER TOPOGRAPHY IN AN OCEAN AND THEIR MERGING |
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| LUO De-hai and LU Yan.THE EVOLUTION OF LONG-LIVED ANTICYCLONIC VORTICES OVER TOPOGRAPHY IN AN OCEAN AND THEIR MERGING[J].Oceanologia Et Limnologia Sinica,2000,31(4):363-369. |
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| Authors: | LUO De-hai and LU Yan |
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| Institution: | College of Marine and Environmental Sciences, Ocean University of Qingdao, Qingdao266003;College of Marine and Environmental Sciences, Ocean University of Qingdao, Qingdao266003 |
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| Abstract: | In this paper, the evolution of long-lived anticyclonic vortices over a Gaussian-shape topography is investigated. It is found that the Gaussian-shape topography has an important influence on the evolution of the long-lived anticyclonic vortices. Under the condition that there is no topographic forcing, only anticyclonic vortices can exist in the uniform westward basic flow. These vortices are long-lived and have a westward tilt. However, if a Gaussian-shape topography exists in the upstream of an anticyclonic vortex, then the vortex will be strengthened and its westward speed increases. Its trajectory looks like the motion of a top. On the other hand, when two anticyclonic vortices having an identical amplitude exist in a uniform westward basic flow, the two vortices do not merge if the topography does not exist. However, once a Gaussian-shape topography exists in the upstream of the two vortices, they can merge and develop into a strong anticyclonic vortex. |
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| Keywords: | Oceanic vortices Anticyclonic vortices Solitary topography Evolution Merging |
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