| YU Xiaolin,WANG Fan,WAN Xiuquan. 2013. Index of Kuroshio penetrating the Luzon Strait and its preliminary application. Acta Oceanologica Sinica, 32(1):1－11 |
| Index of Kuroshio penetrating the Luzon Strait and its preliminary application |
| Index of Kuroshio penetrating the Luzon Strait and its preliminary application |
| Received:January 09, 2012 Revised:May 29, 2012 |
| DOI：10.1007/s13131-013-0262-z |
| Key words:Kuroshio Luzon Strait penetration Index |
| 中文关键词: Kuroshio Luzon Strait penetration Index |
| 基金项目:The National Basic Research Program of China under contract No. 2012CB417401; the National Natural Science Foundation of China under contract No. 40890152; the National Science Foundation for Young Scientist of China under contract No. 41006004; and the Open Fund of Key Laboratory of Data Analysis and Applications, the first institute of oceanography, under contract No. LDAA-2011-03. |
| Author Name | Affiliation | E-mail | | YU Xiaolin | Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Ocean University of China, Qingdao 266100, China | | | WANG Fan | Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | fwang@qdio.ac.cn | | WAN Xiuquan | Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| A method of quantifying the penetration of the Kuroshio into the Luzon Strait is improved with simulated salinity. The new method is applied in an area bounded by 0.6 correlation coefficient contour to the point of 20°N, 118°E which is determined by EOF analysis. The results suggest that the method is suitable for indicating Kuroshio's intrusion into the South China Sea quantitatively. As an indicator, the Kuroshio penetrating the Luzon index (KLI) reveals obvious annual cycle and weak bi-modality. For annual periods, indexes on the surface and subsurface which point the same events have totally opposite signs due to the winter burst of surface westward current. On long-term period, the surface and subsurface indexes have consistent signs. A subsurface index on 150 m avoiding high frequency signals from the surface can be used for indicating long-term Kuroshio intrusion variation. An anti-phase pattern in wavelet coherence map between KLI and Japan large meander index shows that the Luzon Strait is a "smoother" reducing the variability of the Kuroshio transport changes on long-term periods. |
| 中文摘要: |
| A method of quantifying the penetration of the Kuroshio into the Luzon Strait is improved with simulated salinity. The new method is applied in an area bounded by 0.6 correlation coefficient contour to the point of 20°N, 118°E which is determined by EOF analysis. The results suggest that the method is suitable for indicating Kuroshio's intrusion into the South China Sea quantitatively. As an indicator, the Kuroshio penetrating the Luzon index (KLI) reveals obvious annual cycle and weak bi-modality. For annual periods, indexes on the surface and subsurface which point the same events have totally opposite signs due to the winter burst of surface westward current. On long-term period, the surface and subsurface indexes have consistent signs. A subsurface index on 150 m avoiding high frequency signals from the surface can be used for indicating long-term Kuroshio intrusion variation. An anti-phase pattern in wavelet coherence map between KLI and Japan large meander index shows that the Luzon Strait is a "smoother" reducing the variability of the Kuroshio transport changes on long-term periods. |
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