Vertical structure and evolution of the Luzon Warm Eddy

doi:10.1007/s00343-010-9040-3

IOCAS-IR > 海洋环流与波动重点实验室

	Vertical structure and evolution of the Luzon Warm Eddy
	Chen Gengxin 1,2,3; Hou Yijun 1,2; Chu Xiaoqing 1,2,3; Qi Peng1,2
	2010-09-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	28 期号:5 页码:955-961
文章类型	Article
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.
关键词	Luzon Warm Eddy Altimetry Argo South China Sea
学科领域	Limnology ; Oceanography
DOI	10.1007/s00343-010-9040-3
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000281711600001
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5304
专题	海洋环流与波动重点实验室海洋环境腐蚀与生物污损重点实验室
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
第一作者单位	中国科学院海洋研究所; 海洋环流与波动重点实验室
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.

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