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Vertical structure and evolution of the Luzon Warm Eddy

文献类型：期刊论文

作者Chen Gengxin1,2,3; Hou Yijun1,2; Chu Xiaoqing1,2,3; Qi Peng1,2
刊名CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
出版日期2010-09-01
卷号28期号:5页码:955-961
关键词Luzon Warm Eddy Altimetry Argo South China Sea
ISSN号0254-4059
DOI10.1007/s00343-010-9040-3
文献子类Article
英文摘要Eddies are frequently observed in the northeastern South China Sea (SCS). However, there have been few studies on vertical structure and temporal-spatial evolution of these eddies. We analyzed the seasonal Luzon Warm Eddy (LWE) based on Argo float data and the merged data products of satellite altimeters of Topex/Poseidon, Jason-1 and European Research Satellites. The analysis shows that the LWE extends vertically to more than 500 m water depth, with a higher temperature anomaly of 5A degrees C and lower salinity anomaly of 0.5 near the thermocline. The current speeds of the LWE are stronger in its uppermost 200 m, with a maximum speed of 0.6 m/s. Sometimes the LWE incorporates mixed waters from the Kuroshio Current and the SCS, and thus has higher thermohaline characteristics than local marine waters. Time series of eddy kinematic parameters show that the radii and shape of the LWE vary during propagation, and its eddy kinetic energy follows a normal distribution. In addition, we used the empirical orthogonal function (EOF) here to analyze seasonal characteristics of the LWE. The results suggest that the LWE generally forms in July, intensifies in August and September, separates from the coast of Luzon in October and propagates westward, and weakens in December and disappears in February. The LWE's westward migration is approximately along 19A degrees N latitude from northwest of Luzon to southeast of Hainan, with a mean speed of 6.6 cm/s.; Eddies are frequently observed in the northeastern South China Sea (SCS). However, there have been few studies on vertical structure and temporal-spatial evolution of these eddies. We analyzed the seasonal Luzon Warm Eddy (LWE) based on Argo float data and the merged data products of satellite altimeters of Topex/Poseidon, Jason-1 and European Research Satellites. The analysis shows that the LWE extends vertically to more than 500 m water depth, with a higher temperature anomaly of 5A degrees C and lower salinity anomaly of 0.5 near the thermocline. The current speeds of the LWE are stronger in its uppermost 200 m, with a maximum speed of 0.6 m/s. Sometimes the LWE incorporates mixed waters from the Kuroshio Current and the SCS, and thus has higher thermohaline characteristics than local marine waters. Time series of eddy kinematic parameters show that the radii and shape of the LWE vary during propagation, and its eddy kinetic energy follows a normal distribution. In addition, we used the empirical orthogonal function (EOF) here to analyze seasonal characteristics of the LWE. The results suggest that the LWE generally forms in July, intensifies in August and September, separates from the coast of Luzon in October and propagates westward, and weakens in December and disappears in February. The LWE's westward migration is approximately along 19A degrees N latitude from northwest of Luzon to southeast of Hainan, with a mean speed of 6.6 cm/s.
学科主题Limnology ; Oceanography
URL标识查看原文
语种英语
WOS记录号WOS:000281711600001
公开日期2010-12-24
源URL[http://ir.qdio.ac.cn/handle/337002/5305]  
专题海洋研究所_海洋环流与波动重点实验室
海洋研究所_海洋腐蚀与防护研究发展中心
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, KLOCAW, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式
GB/T 7714		 Chen Gengxin,Hou Yijun,Chu Xiaoqing,et al. Vertical structure and evolution of the Luzon Warm Eddy[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(5):955-961.
APA Chen Gengxin,Hou Yijun,Chu Xiaoqing,&Qi Peng.(2010).Vertical structure and evolution of the Luzon Warm Eddy.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(5),955-961.
MLA Chen Gengxin,et al."Vertical structure and evolution of the Luzon Warm Eddy".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.5(2010):955-961.

入库方式： OAI收割

来源：海洋研究所

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