| 三维斜压陆架海模式的应用: 南海上混合层的季节变化 |
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| 引用本文： | 蔡树群,甘子钧.三维斜压陆架海模式的应用: 南海上混合层的季节变化[J].海洋学报,2000,22(3):7-14. |
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| 作者姓名： | 蔡树群 甘子钧 |
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| 作者单位： | 中国科学院南海海洋研究所, 广州510301 |
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| 基金项目： | 国家自然科学基金资助项目(编号：49636230)；科学院资助项目(编号：KZ951-B1-408)；国家重点基础研究规划资助项目(G1999043806号)． |
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| 摘 要： | 从一个三维斜压陆架海模式的数值模拟结果来揭示南海上混合层的季节变化规律,结果表明:(1)在南海北部上混合层的厚度(即混合层的下界深度)具有明显的季节性变化,与在南海南部上混合层的变化明显不同,前者的混合强度的变化幅度远比后者的要大得多.(2)在中南半岛中部东岸外海的西边界区域内,由于经常受冷涡控制,下层冷水涌升,上层水体层化显着,使得该海区垂直混合减弱.(3)在一些气旋(反气旋)涡的边缘,混合层厚度等值线分布密集,且水平梯度较大.(4)南海上混合层的厚度分布特征与上层环流的分布格局之间存在着较好的地转调整关系.
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| 关 键 词： | 南海 上混合层 环流分布格局 数值模式 |
| 收稿时间： | 1998/12/9 0:00:00 |
| 修稿时间： | 1999/9/12 0:00:00 |
The application of a three-dimensional baroclinic shelf sea model: The seasonal variation of the South China Sea upper mixed layer |
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| Cai Shuqun and Gan Zijun.The application of a three-dimensional baroclinic shelf sea model: The seasonal variation of the South China Sea upper mixed layer[J].Acta Oceanologica Sinica (in Chinese),2000,22(3):7-14. |
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| Authors: | Cai Shuqun and Gan Zijun |
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| Institution: | South China An Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301 |
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| Abstract: | According to a three-dimensional baroclinic shelf sea model's numerical simulation results, the seconal variation of the South China Sea(SCS) upper mixed layer is revealed. It is shown that (1) In the northern SCS, the variation of the upper mixed layer depth(I, e., the depth of the lower limit of mixed layer)is distinctly seasonal,which is different to that in the southern SCS, and the strength variation range of mixed layer is larger in the north-err, SCS. (2) In the western boundary area along the east offshore of middle Indo-China Peninsular, due to the con-trol of cold eddy, the lower cold water upwells, and the upper layer water stratifys distinctly, which makes the ver-tical mixing weakened. (3) In the peripheries of some cyclonic(anticyclonic) eddies, the distribution of mixed layer depth isobath is dense and its horizontal gradient is large. (4) There is a good relation of geostrophic adjustrment be-tween the distribution characteristic of upper mixed layer and the pattern of upper circulation in the SCS. |
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| Keywords: | South China Sea upper mixed layer circulation pattern numerical simulation |
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