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| 泰利台风对台湾东北黑潮入侵东海陆架影响的研究 |
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何源首1,2, 胡珀1,3,4, 殷玉齐1,3,4, 侯一筠1,2,3,4
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1.中国科学院海洋研究所 海洋环流与波动重点实验室 青岛 266071;2.中国科学院大学 北京 100049;3.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 青岛 266237;4.中国科学院海洋大科学中心 青岛 266071
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| 摘要: |
| 本文利用卫星高度计数据和分析数据，并结合同时期现场深水潜标的流速观测数据，研究了超强台风泰利过境前后台湾东北附近海域流场、位势密度场、位势涡度场以及黑潮入侵东海陆架强度的变化。分析结果表明，泰利台风通过改变台湾东北陆坡附近海域的流场、位势密度场，显著地削弱（增强）了西段（东段）陆坡附近的位势涡度梯度，从而使得西段（东段）陆坡黑潮入侵东海陆架的强度显著增强（减弱）。此外，本文还区分了台湾东北西部陆坡附近表层的跨陆坡"上凸型"位势涡度分布与次表层的跨陆坡"下凹型"位势涡度分布，并认为次表层的跨陆坡"下凹型"位势涡度分布也应作为台湾东北西部陆坡附近"位势涡度障碍"的重要组成部分。本文的研究结果揭示了大气中的台风过程对台湾东北黑潮入侵东海陆架产生显著影响的关键过程及机制，相关结论可为台湾东北黑潮入侵东海陆架变化规律的研究提供有价值的参考。 |
| 关键词: 台湾东北 黑潮入侵 泰利台风 位势涡度 水体层结 陆坡逆流 |
| DOI：10.11693/hyhz20190900166 |
| 分类号:P722.6 |
| 基金项目:国家自然科学基金，41630967号，41476018号，41776020号；国家海洋局"全球变化与海气相互作用专项"，GASI-IPOVAI-01-06号；国家自然科学基金委员会-创新研究群体科学基金，41421005号；国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目，U1606402号。 |
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| THE INTENSITY OF KUROSHIO INTRUSION OFF NORTHEASTERN TAIWAN UNDER THE INFLUENCE OF SUPER TYPHOON TALIM |
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HE Yuan-Shou1,2, HU Po1,3,4, YIN Yu-Qi1,3,4, HOU Yi-Jun1,2,3,4
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1.CAS Key Laboratory of Ocean Circulation and Waves, Institute of oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Laboratory for Ocean and Climate Dynamics, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| Based on satellite altimeter and analysis data, in conjunction with mooring observations, we studied the variations of the flow field, potential density field, potential vorticity (PV) field and Kuroshio intrusion intensity off the northeastern Taiwan under the influence of super typhoon Talim. The results suggest that super typhoon Talim significantly weakened (enhanced) the potential vorticity gradient across the western (eastern) slope off northeastern Taiwan by changing the flow field and potential density field, thus, resulting in the enhancement (weakening) of the Kuroshio intrusion through the western (eastern) slope. In addition, this study distinguished the "downward concave" crossshelf PV distribution in the subsurface layer from the "upward convex" crossshelf PV distribution in the surface layer near the western slope. At last, we proposed the mechanisms of typhoons in the atmosphere affecting the Kuroshio intrusion off the northeastern Taiwan. |
| Key words: northeastern Taiwan Kuroshio intrusion typhoon Talim potential vorticity vertical stratification counter-flow |