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| 潮汐对东海陆架边缘处水交换的影响 |
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胡放1,2,3, 刘亚豪2,3,4,5, 侯一筠1,2,3,4,5
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1.中国科学院大学, 北京 100049;2.中国科学院海洋研究所, 山东 青岛 266071;3.中国科学院海洋环流与波动重点实验室, 山东 青岛 266071;4.中国科学院海洋大科学研究中心, 山东 青岛 266071;5.青岛海洋科学与技术试点国家实验室 海洋动力过程与气候功能实验室, 山东 青岛 266237
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| 摘要: |
| 为探讨潮汐对东海陆架边缘处水交换通量的影响, 本文基于ROMS海洋数值模式, 对渤海、黄海、东海的潮汐、环流进行了模拟研究。研究结果显示, 在水平方向上, 潮汐效应主要影响我国台湾岛东北及日本九州西南的水交换, 其中在台湾岛东北区域, 潮汐效应通过增加黑潮分支流(KBC)的向岸及离岸速度来加强黑潮水的跨陆架交换。潮汐效应对200 m等深线处跨等深线流速的影响量值约为3~5 cm/s。从垂直方向上来看, 潮汐效应能够影响到深度200 m处水层的深层交换。进一步研究其作用机制, 发现潮汐效应主要通过平流输送项来影响水体交换, 而其对水体的水平及垂直扩散项的影响较小。 |
| 关键词: 东海 潮汐 陆架边缘处水交换 ROMS模式 |
| DOI：10.11759/hykx20200618002 |
| 分类号:P722.6 |
| 基金项目:国家自然科学基金项目(42176014, 41630967, 41776020);“全球变化与海气相互作用”专项项目(GASI-IPOVAI-01-06); 国家自然科学基金创新研究群体项目(41421005); 国家自然科学基金-山东省联合资助海洋科学研究中心项目(U1606402) |
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| Tidal effect on water exchange across the East China Sea shelf break |
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HU Fang1,2,3, LIU Ya-hao2,3,4,5, HOU Yi-jun1,2,3,4,5
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1.University of Chinese Academy of Sciences, Beijing 100049, China;2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.Key Laboratory of Ocean Circulation and Fluctuation, Chinese Academy of Sciences, Qingdao 266071, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;5.Laboratory for Ocean and Climate Dynamics, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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| Abstract: |
| A successful simulation of tides and currents in the Bohai Sea, Yellow Sea, and East China Sea was developed based on the regional ocean modeling system (ROMS) in high horizontal resolution. The tidal effect on the water exchange at the East China Sea shelf break is discussed. According to the simulation results, in the horizontal direction, the tidal effect mainly affects the water exchange in northeast Taiwan and southwest Kyushu. In northeast Taiwan, the tidal effect enhances the exchange of Kuroshio across the shelf break by increasing the onshore and offshore velocities of the Kuroshio branch current (KBC). In the vertical direction, the tidal effect can affect the deep exchange of the 200 m water layer. The influence of the tidal effect on the velocities across the 200 m isobath is approximately 3–5 cm/s. The tidal effect mainly affects the water exchange through an advection term and slightly affects the horizontal and vertical diffusion terms. |
| Key words: East China Sea tide shelf break water exchange ROMS model |