Observations of Kuroshio intrusion into the South China Sea

doi:10.1007/s00343-010-9065-7

IOCAS-IR > 海洋环流与波动重点实验室

	Observations of Kuroshio intrusion into the South China Sea
	Liu Ze 1,2,3; Hou Yijun 1,2; Qi Peng1,2 ; Hu Po1,2
	2010-09-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	28 期号:5 页码:1012-1020
文章类型	Article
摘要	To discuss the intrusion of the Kuroshio into the SCS, we examined the mixing between the North Pacific and South China Sea (SCS) waters based on in-situ CTD data collected in August and September 2008 and the moored ADCP data taken from mid September 2008 to early July 2009. The CTD survey included four meridional sections from 119A degrees E to 122A degrees E around the Luzon Strait, during which pressure, temperature, and salinity were measured. The CTD data show that the isopycnal surface tilted from the SCS to the North Pacific; and it was steeper in the lower layers than in the upper ones. Meanwhile, we found strong vertical mixing taken place in the areas near 121A degrees E. The Kuroshio in high temperature and salinity intruded westward through Luzon Strait. The frequency of buoyancy was one order of magnitude greater than that of the common ones in the ocean, suggesting stronger stratification in the northeastern SCS. On the other hand, the long-term ADCP data show that before late October 2008, the direction of water flow in the SCS was eastward, and from November 2008 to late February 2009, it turned northwestward in the layers shallower than 150 m, while remained unchanged in deep layers from 200 to 450 m. From March to June 2009, the direction shifted with increasing depth from northward to southward, akin to the Ekman spiral. EOF analysis of the current time series revealed dominant empirical modes: the first mode corresponded to the mean current and showed that the Kuroshio intrusion occurred in the upper layers only from late December to early March. The temporal coefficient of the first and the second mode indicated clearly a dominant signal in a quasi-seasonal cycle.; To discuss the intrusion of the Kuroshio into the SCS, we examined the mixing between the North Pacific and South China Sea (SCS) waters based on in-situ CTD data collected in August and September 2008 and the moored ADCP data taken from mid September 2008 to early July 2009. The CTD survey included four meridional sections from 119A degrees E to 122A degrees E around the Luzon Strait, during which pressure, temperature, and salinity were measured. The CTD data show that the isopycnal surface tilted from the SCS to the North Pacific; and it was steeper in the lower layers than in the upper ones. Meanwhile, we found strong vertical mixing taken place in the areas near 121A degrees E. The Kuroshio in high temperature and salinity intruded westward through Luzon Strait. The frequency of buoyancy was one order of magnitude greater than that of the common ones in the ocean, suggesting stronger stratification in the northeastern SCS. On the other hand, the long-term ADCP data show that before late October 2008, the direction of water flow in the SCS was eastward, and from November 2008 to late February 2009, it turned northwestward in the layers shallower than 150 m, while remained unchanged in deep layers from 200 to 450 m. From March to June 2009, the direction shifted with increasing depth from northward to southward, akin to the Ekman spiral. EOF analysis of the current time series revealed dominant empirical modes: the first mode corresponded to the mean current and showed that the Kuroshio intrusion occurred in the upper layers only from late December to early March. The temporal coefficient of the first and the second mode indicated clearly a dominant signal in a quasi-seasonal cycle.
关键词	Ctd Survey Moored Adcp Data Kuroshio Intrusion Scs Water Evolution Period
学科领域	Limnology ; Oceanography
DOI	10.1007/s00343-010-9065-7
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000281711600009
引用统计	被引频次：4[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/337002/5294
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	Liu Ze,Hou Yijun,Qi Peng,et al. Observations of Kuroshio intrusion into the South China Sea[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(5):1012-1020.
APA	Liu Ze,Hou Yijun,Qi Peng,&Hu Po.(2010).Observations of Kuroshio intrusion into the South China Sea.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(5),1012-1020.
MLA	Liu Ze,et al."Observations of Kuroshio intrusion into the South China Sea".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.5(2010):1012-1020.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Observations of Kuro（609KB）			限制开放	--	浏览