台湾以东黑潮的低频变化及机制研究

许灵静; 齐继峰; 尹宝树; 杨德周; 陈海英

doi:10.3969/j.issn.0253-4193.2017.09.002

台湾以东黑潮的低频变化及机制研究

doi: 10.3969/j.issn.0253-4193.2017.09.002

1.
中国科学院海洋研究所, 山东青岛 266071;中国科学院海洋环流与波动重点实验室, 山东青岛 266071;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;中国科学院海洋环流与波动重点实验室, 山东青岛 266071;青岛海洋科学与技术国家实验室海洋动力过程与气候功能实验室, 山东青岛 266000
3.
中国科学院海洋研究所, 山东青岛 266071;中国科学院海洋环流与波动重点实验室, 山东青岛 266071;青岛海洋科学与技术国家实验室海洋动力过程与气候功能实验室, 山东青岛 266000;中国科学院大学, 北京 100049

基金项目: 国家自然科学基金项目（41506020，41476019，41376030）；中科院先导专项A项目（XDA11020104，XDA11020305）；国家自然科学基金创新研究群体科学基金（41421005）；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（U1406401）；全球变化和海气相互作用专项（GASI-03-01-01-02）

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出版历程
- 收稿日期: 2016-12-04
- 修回日期: 2017-02-15

Low frequency variability and machanism of the Kuroshio in the east of Taiwan

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China
2.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences, Qingdao 266071, China;Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China
3.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences, Qingdao 266071, China;Function Laboratory for Ocean Dynamics and Climate, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China;University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 本文基于AVISO（Archiving， Validation and Interpretation of Satellite Oceanographic data）1993-2015年间的海表面绝对动力高度数据，研究了台湾以东黑潮的低频变化特征，并探讨了影响其变化的机制。结果表明，台湾以东多年平均的黑潮流幅值约为136 km，表层流量值约为7.75×10⁴ m²/s，对应的标准差分别为28 km和2.14×10⁴ m²/s。台湾以东黑潮不仅具有显著的季节变化特征，还具有显著的年际变化特征。功率谱分析结果表明，台湾以东黑潮表层流量具有1 a和2.8 a的显著周期。空间上，台湾东南部黑潮的年际变化幅度比东北部强烈。相关性及合成分析结果表明，台湾以东黑潮的年际变化与PTO（Philippines-Taiwan Oscillation）之间存在显著的相关性。PTO年际震荡所导致的副热带逆流区反气旋式涡旋与气旋式涡旋的相对强度是影响台湾以东黑潮年际变化的主要动力因素。
- 台湾 /
- 黑潮 /
- 年际变化 /
- 中尺度涡 /
- PTO
Abstract: The mean state and low frequency variability of Kuroshio in the east of Taiwan is investigated by quantitatively analyzing the 23-year (1993-2015) surface Absolute Dynamic Topography (ADT) data. The mean state of Kuroshio is given, with a flowing width of around 136 km and surface transport of about 7.75×10⁴ m²/s, the standard deviation of the width and surface transport are 28 km and 2.14×10⁴ m²/s, respectively. The results indicate that the Kuroshio east of Taiwan shows both seasonal and interannual variability significantly. Results of power spectrum analysis indicate that the primary periods of the Kuroshio surface transport in east of Taiwan are 1 and 2.8 years respectively. Spatially, the Kuroshio surface transport in southeast of Taiwan has a relatively larger variability than that in the northeast of Taiwan. Correlation and composite analysis shows that PTO(Philippines-Taiwan Oscillation)has a significant correlation with the interannual variability of Kuroshio. The PDO-induced relative intensity of the anticyclonic and cyclonic eddy is the dominant factor controlling the interannual variability of Kuroshio in east of Taiwan.
- Taiwan /
- Kuroshio /
- interannual variability /
- mesoscale eddy /
- PTO

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