| 摘要: |
| 长江口及其邻近海区的水动力学研究因其与沿岸地区的经济发展关系密切而倍受海洋学者的广泛关注。为了揭示该海区环流的动力过程和温、盐结构的分布特征及其动力成因,首先在对研究海区的地形特征、海面风应力、海面温度、海面盐度以及北、南、东三个液边界温度和盐度现场观测资料进行全面分析的基础上。选定适合于研究海区的三维斜压流体动力学模型(POM)。以研究海区冬、春、夏和秋季的海面风应力、海面温度和盐度资料作为海面边界条件,以北、南和东三个液边界的温度和盐度资料作为侧向液边界条件,并考虑长江径流、台湾暖流和东海沿岸流等外海入流的影响,对研究海区(120.9°E—124°E,29.5°N—33°N)四个季节的斜压环流和温、盐结构实施了动力学数值研究。获得了与观测事实相一致的三维流速和温、盐结构的空间分布。从动力学角度揭示并阐明长江口及其邻近海区水平环流和垂直环流的动力过程以及温、盐结构的分布特征和动力成因,为海区的生态动力学研究提供动力条件。 |
| 关键词: 长江口邻近海区，环流， 温盐结构，海面边界，侧向液边界 |
| DOI：10.11693/hyhz200801012012 |
| 分类号: |
| 基金项目:国家自然科学重点基金，50339040号和90411013号;中国科学院知识工程创新项目，KZCX3-SW-232号和KZCX2-YW-201号 |
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| THE DYNAMIC OF CIRCULATION AND TEMPERATURE-SALINITY STRUCTURE IN THE CHANGJIANG MOUTH AND ITS ADJACENT MARINE AREA I.BOUNDARY CONDIION AND RESEARCH SCHEME |
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LIU Xing-Quan, YIN Bao-Shu, HOU Yi-Jun
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Institute of Oceanology,Chinese Academy of Sciences
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| Abstract: |
| Hydrodynamic study in the Chanjiang River mouth and its adjacent area(120.9°E—124°E,29.5°N—33°N) raised extensive interests in recent years. To reveal the dynamic mechanism regarding horizontal/vertical circulation and the temperature/salinity (T/S) structure in the area, surface wind stress and T/S distribution were analyzed on the topography characteristics with offside sea as the side liquid boundary condition in consideration of influcence from Changjiang River runoff, the East China Sea coastal current, and Taiwan warm current using 3D baroclinic ocean model (POM), numercial simulations were performed for circulation and T/S patterns of the research area in season. The distribution of three-dimensional current velocity and T/S structure was consistent with the previous investigation results. |
| Key words: Changjiang River mouth, Circulation, Temperature-salinity structure, Sea surface boundary, Side liquid boundary |
