| 摘要: |
| 摘要：黄海是典型的强潮驱动的陆架浅海，为了研究黄海对台风的响应特点，本文利用区域海洋模式(Regional Ocean Modeling Systems, ROMS)分别模拟了在有潮和无潮作用下黄海对台风布拉万的响应过程。结果表明，不管潮的存在与否，布拉万经过黄海后都引起了海表面降温现象和流速的近惯性振荡响应。但是强背景潮流显著影响着黄海对布拉万的响应过程：一方面，由于潮的存在，近岸垂向混合均匀的较暖水体与远岸较冷水体之间会形成潮混合温度锋面，布拉万过后，暖水发生了明显的离岸扩张，尽管路径右侧的混合层降温更为显著，但是黄海西岸的暖水扩张更为明显；另一方面，潮的存在减弱了布拉万产生的近惯性振荡响应，半日潮流在黄海仍然占据主导地位。带通滤波提取的近惯性流速具有垂向第一模态特征，潮的作用减弱了混合层中布拉万产生的近惯性能量，但却使其更易穿过跃层传入黄海内部。深度和时间平均的近惯性能量分布表明，黄海对布拉万的近惯性响应主要分布于中部水深相对较深的区域。 |
| 关键词: 黄海 ROMS 潮 近惯性能量 台风 |
| DOI：10.11693/hyhz20150200049 |
| 分类号:P731.1 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| A NUMERICAL STUDY OF THE YELLOW SEA RESPONSES TO BOLAVEN WITH AND WITHOUT TIDES |
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mengqingjun and lipeiliang
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Key Laboratory of Physical Oceanography, Ocean University of China,Key Laboratory of Physical Oceanography, Ocean University of China
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| Abstract: |
| Abstract The Yellow Sea is a tidal energetic continental shelf sea, in order to investigate the characteristics of the Yellow Sea to the typhoons, the responses to the typhoon Bolaven are simulated with Regional Ocean Modeling Systems (ROMS) with and without tidal forcing, respectively. The results indicate that no matter whether there is tidal forcing, the drop of the sea surface temperature and the near inertial oscillations are well simulated. We conclude that the strong background tidal currents could obviously affect the ocean responses to Bolaven: because of the tides, a tidal induced temperature front could be developed between the warmer water near the shore and the colder water off the shore. After Bolaven, the warmer water expands offshore, although the upper mixed layer temperature drop is significant right to the track, it is much more obvious of the near shore warmer water expansion west of the Yellow Sea. On the other hand, the near inertial responses are weakened because of the tides, and the semidiurnal currents are still prominent. The near inertial velocities are characterized by a first baroclinic mode in the vertical. The near inertial energy in the upper mixed layer is decreased because of the tides; however, the part that penetrating the thermocline propagating into the ocean interior is increased. At last, we find that the near inertial responses to Bolaven are mainly distributed in the central areas of the Yellow Sea from the distributions of the depth-time averaged near inertial energy. |
| Key words: Yellow Sea ROMS tides near inertial energy typhoon |