| 北赤道流分岔点与印尼贯穿流的相关分析 |
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| 引用本文： | 赵云霞,魏泽勋,王永刚,徐腾飞,冯颖.北赤道流分岔点与印尼贯穿流的相关分析[J].海洋学报(英文版),2015,34(9):1-11. |
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| 作者姓名： | 赵云霞 魏泽勋 王永刚 徐腾飞 冯颖 |
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| 作者单位： | 中国海洋大学 海洋环境学院, 山东 青岛 266100;国家海洋局第一海洋研究所, 山东 青岛 266061,国家海洋局第一海洋研究所, 山东 青岛 266061;青岛海洋科学与技术国家实验室, 区域海洋动力学和数值模拟功能实验室, 山东 青岛 266071,国家海洋局第一海洋研究所, 山东 青岛 266061;青岛海洋科学与技术国家实验室, 区域海洋动力学和数值模拟功能实验室, 山东 青岛 266071,国家海洋局第一海洋研究所, 山东 青岛 266061,国家海洋局第一海洋研究所, 山东 青岛 266061 |
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| 摘 要： | Based on monthly mean Simple Ocean Data Assimilation(SODA) products from 1958 to 2007,this study analyzes the seasonal and interannual variability of the North Equatorial Current(NEC) bifurcation latitude and the Indonesian Throughflow(ITF) volume transport. Further,Empirical Mode Decomposition(EMD) method and lag-correlation analysis are employed to reveal the relationships between the NEC bifurcation location,NEC and ITF volume transport and ENSO events. The analysis results of the seasonal variability show that the annual mean location of NEC bifurcation in upper layer occurs at 14.33°N and ITF volume transport has a maximum value in summer,a minimum value in winter and an annual mean transport of 7.75×106 m3/s. The interannual variability analysis indicates that the variability of NEC bifurcation location can be treated as a precursor of El Ni?o. The correlation coefficient between the two reaches the maximum of 0.53 with a time lag of 2 months. The ITF volume transport is positively related with El Ni?o events with a maximum coefficient of 0.60 by 3 months. The NEC bifurcation location is positively correlated with the ITF volume transport with a correlation coefficient of 0.43.
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| 关 键 词： | 北赤道流分岔点 印尼贯穿流 经验模态分解 超前滞后相关分析 |
| 收稿时间： | 2014/9/23 0:00:00 |
| 修稿时间： | 2015/2/28 0:00:00 |
Correlation analysis of the North Equatorial Current bifurcation and the Indonesian Throughflow |
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| ZHAO Yunxi,WEI Zexun,WANG Yonggang,XU Tengfei and FENG Ying.Correlation analysis of the North Equatorial Current bifurcation and the Indonesian Throughflow[J].Acta Oceanologica Sinica,2015,34(9):1-11. |
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| Authors: | ZHAO Yunxi WEI Zexun WANG Yonggang XU Tengfei and FENG Ying |
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| Institution: | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China,First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Function Laboratory for Ocean Dynamics and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China,First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;Function Laboratory for Ocean Dynamics and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China,First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China and First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | Based on monthly mean Simple Ocean Data Assimilation (SODA) products from 1958 to 2007, this study analyzes the seasonal and interannual variability of the North Equatorial Current (NEC) bifurcation latitude and the Indonesian Throughflow (ITF) volume transport. Further, Empirical Mode Decomposition (EMD) method and lag-correlation analysis are employed to reveal the relationships between the NEC bifurcation location, NEC and ITF volume transport and ENSO events. The analysis results of the seasonal variability show that the annual mean location of NEC bifurcation in upper layer occurs at 14.33°N and ITF volume transport has a maximum value in summer, a minimum value in winter and an annual mean transport of 7.75×106 m3/s. The interannual variability analysis indicates that the variability of NEC bifurcation location can be treated as a precursor of El Niño. The correlation coefficient between the two reaches the maximum of 0.53 with a time lag of 2 months. The ITF volume transport is positively related with El Niño events with a maximum coefficient of 0.60 by 3 months. The NEC bifurcation location is positively correlated with the ITF volume transport with a correlation coefficient of 0.43. |
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| Keywords: | North Equatorial Current bifurcation Indonesian Throughflow Empirical Mode Decomposition lagcorrelation analysis |
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