| 摘要: |
| 东中国海由渤、黄、东海三部分组成，为典型的陆架边缘海。对这一海域环流的认识，过去多依赖于温盐资料分析和有限的测流数据。近年来随着计算机技术的迅猛发展，数值模拟已成为研究环流的结构、起源和动力机制的重要手段。国内、外学者在这一领域进行了大量的工作，袁耀初等(1982)使用单层模型对东中国海风生-热盐环流进行诊断计算；王卫等(1987)使用一个正压模式计算了黄、东海黑潮流系和涡旋现象；袁耀初等(1987a，b，1989)采用诊断数值计算方法求解涡度方程，得出其所测海区的三维夏、冬季海流流场；袁耀初等(1990)采用一种预报模式研究东中国海的冬季环流；Chao(1991)用三维有限差分模式探讨了黑潮、季风及长江流量等因子对东中国海环流的影响；袁耀初(1993)针对东海东部的流动建立了一个三维预报模式；朱耀华等(1994)建立了一个三维正压模式研究了渤、黄、东海冬、夏季的环流情况；梁湘三等( Liang et al.，1994)用二层模式模拟了黑潮在台湾东北入侵陆架的现象；王凯于1998年在冯士筰提出的浅海Lagrange余流理论上建立了一种三维斜压陆架环流模式，对渤、黄、东海冬、夏季环流进行了诊断数值模拟；王辉(1996)基于一种三维斜压浅海Lagrange余流的弱非线性理论，模拟计算了南黄海和东海夏季三维Lagrange余流；朱建荣等(1998)建立了一个σ坐标系下三维非线性斜压陆架模式，对东中国海冬、夏季环流进行模拟计算，并数值实验了长江径流量、台湾暖流、黄海冷水团、风场等因素对长江冲淡水扩展的作用。以上这些工作对了解东中国海环流的结构、起源和动力机制都具有重要意义。但是这些工作由于当时计算机速度和容量的限制，其数值模式不够完普，有的使用了二维(单层)或诊断模式，有的网格较粗，多数未考虑实际的海岸线和海面热交换对温度场的影响等，从计算结果来看，没有一个模式能全面地模拟出发生在东中国海的环流现象。
本文作者试图采用Blumberg等(1983,1987)建立的σ坐标系下三维斜压预报模式，考虑了东海主要水道间的流量交换、长江径流、海面风应力、海面热通量等诸多因素的影响，对东中国海夏季的环流进行了数值模拟，结果较全面地模拟了东中国海的环流现象，为今后进一步开展此项工作提供科学依据。 |
| 关键词: 中国海环流 数值模拟 三维 |
| DOI： |
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| 基金项目:中国科学院海洋研究所调查研究报告第3860号。国家自然科学基金项目，4966279号和国家重点基础研究发展规划项目资助，G1999043808。 |
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| SIMULATION OF THE THREE-DIMENSIONAL CIRCULATION OF THE EAST CHINA SEAS IN SUMMER |
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LI Huifei, ZHAO Baoren
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Institute of Oceanology, The Chinese Academy of Sciences
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| Abstract: |
| A three dimensional baroclinic prognostic model on σ-coordinates was established on the basis of POM to simulate the East China Seas circulation in summer considering the topography, inflow and outflow at the open boundary, Changjiang runoff, heat flux and wind stress on the surface. This study showed that ① the Kuroshio flows along the continental shelf slope of the East China Sea flowing in accordance with the slope topography and some eddies appear on its two sides; ② the upper water of the Taiwan Warm Current comes mainly from the Taiwan Strait and that the bottom water comes mostly from Kuroshio sub-surface water flowing on the shelf and passing through the east of Taiwan Island; ③ the Tsushima Warm Current in summer comes from multiple sources: the Taiwan Warm Current, one of the branches of the Kuroshio, mixed water of Changjiang Diluted Water with West Korea Coastal Current and Taiwan Warm Current; ④ the Changjiang Diluted Water turns northwards rapidly after flow sing out the Changjiang River Mouth, affected by Zhejiang Coast Current, Taiwan Warm Current and southwest monsoon, and flows southeastwards after arriving at around 34°N; ⑤ there is a meso-scale anticyclonic eddy in the northeast of the Changjiang River Mouth it was formed by the north branch of the Taiwan Warm Current and there is another cyclonic eddy in southwest of Chejudo Island; ⑥ the circulation of the Huanghai Cold Water Mass in summer is divided into north and south parts and their current is strong in the upper layer and weak near the bottom layer; ⑦ there is a meso-scale anticyclone eddy near the Qingdao- Shidao coast area. |
| Key words: the East China Seas circulation simulatation three-dimensional |
