| Features of eddy kinetic energy and variations of upper circulation in the South China Sea |
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| 作者姓名： | He Zhigang Wang Dongxiao Hu Jianyu |
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| 作者单位： | He Zhigang，Wang Dongxiao，Hu Jianyu1. Institute of Subtropical Oceanography，Xiamen University，Xiamen 361005，China2. LED，South China Sea Institute of Oceanology，Chinese Academy of Sciences，Guangzhou 510301，China |
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| 基金项目： | This study was supported by the LED of South China Sea Institute of Oceanology，the State Key Basic Research Program of China under contract No. G1999043806，the Key Project of Fujian Province of China under contract No. 98-Z-179. |
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| 摘 要： | The features of eddy kinetic energy (EKE) and the variations of upper circulation in theSouth China Sea (SCS) are discussed in this paper using geostrophic currents estimated from Maps of Sea Level Anomalies of the TOPEX/Poseidon altimetry data. A high EKE center is identified in the southeast of Vietnam coast with the highest energy level 1 400 cm2 ·s~(-2) in both summer and autumn. This high EKE center is caused by the instability of the current axis leaving the coast of Vietnam in summer and the transition of seasonal circulation patterns in autumn. There exists another high EKE region in the northeastern SCS, southwest to Taiwan Island in winter. This high EKE region is generated from the eddy activities caused by the Kuroshio intrusion and accumulates more than one third of the annual EKE, which confirms that the eddies are most active in winter. The transition of upper circulation patterns is also evidenced by the directions of the major axises of velocity variance ellipses between 10°and 14.5°N
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| 关 键 词： | The South China Sea eddy kinetic energy TOPEX/Poseidon upper circulation altimeter data |
| 收稿时间： | 2002/4/10 0:00:00 |
| 修稿时间： | 2002/5/20 0:00:00 |
Features of eddy kinetic energy and variations of upper circulation in the South China Sea |
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| He Zhigang,Wang Dongxiao,Hu Jianyu.Features of eddy kinetic energy and variations of upper circulation in the South China Sea[J].Acta Oceanologica Sinica,2002,21(2):305-314. |
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| Authors: | He Zhigang Wang Dongxiao and Hu Jianyu |
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| Institution: | 1.Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China;LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China2.LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China3.Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: | The features of eddy kinetic energy (EKE) and the variations of upper circulation in the South China Sea (SCS) are discussed in this paper using geostrophic currents estimated from Maps of Sea Level Anomalies of the TOPEX/Poseidon altimetry data. A high EKE center is identified in the southeast, of Viemam coast with the highest energy level 1400 cm2@s-2 in both summer and autumn.This high EKE center is caused by the instability of the current axis leaving the coast of Vietnam in summer and the transition of seasonal circulation patterns in autumn. There exists another high EKE region in the northeastern SCS, southwest to Taiwan Island in winter. This high EKE region is generated from the eddy activities caused by the Kuroshio intrusion and accumulates more'than one third of the annual EKE, which confirms that the eddies are most active in winter. The transition of upper circulation patterns is also evidenced by the directions of the major axises of velocity variance ellipses between 10°and 14.5°N, which supports the model results reported before. |
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| Keywords: | The South China Sea eddy kinetic energy TOPEX/Poseidon upper circulation altimeter data |
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