A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation

doi:10.1007/s00343-009-9240-x

IOCAS-IR > 海洋环流与波动重点实验室

	A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation
	Xie Lingling 1; Tian Jiwei 1; Hu Dunxin 2; Wang Fan2
	2009-11-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	27 期号:4 页码:955-965
文章类型	Article
摘要	Using the data of conductivity-temperature-depth (CTD) intensive observations conducted during Oct.-Nov. 2005, this study provides the first three-dimension quasi-synoptic description of the circulation in the western North Pacific. Several novel phenomena are revealed, especially in the deep ocean where earlier observations were very sparse. During the observations, the North Equatorial Current (NEC) splits at about 12A degrees N near the sea surface. This bifurcation shifts northward with depth, reaching about 20A degrees N at 1 000 m, and then remains nearly unchanged to as deep as 2 000 m. The Luzon Undercurrent (LUC), emerging below the Kuroshio from about 21A degrees N, intensifies southward, with its upper boundary surfacing around 12A degrees N. From there, part of the LUC separates from the coast, while the rest continues southward to join the Mindanao Current (MC). The MC extends to 2 000 m near the coast, and appears to be closely related to the subsurface cyclonic eddies which overlap low-salinity water from the North Pacific. The Mindanao Undercurrent (MUC), carrying waters from the South Pacific, shifts eastward upon approaching the Mindanao coast and eventually becomes part of the eastward undercurrent between 10A degrees N and 12A degrees N at 130A degrees E. In the upper 2 000 dbar, the total westward transport across 130A degrees E between 7.5A degrees N and 18A degrees N reaches 65.4 Sv (1 Sv = 10(-6) m(3)s(-1)), the northward transport across 18A degrees N from Luzon coast to 130A degrees E is up to 35.0 Sv, and the southward transport across 7.5A degrees N from Mindanao coast to 130A degrees E is 27.9 Sv.; Using the data of conductivity-temperature-depth (CTD) intensive observations conducted during Oct.-Nov. 2005, this study provides the first three-dimension quasi-synoptic description of the circulation in the western North Pacific. Several novel phenomena are revealed, especially in the deep ocean where earlier observations were very sparse. During the observations, the North Equatorial Current (NEC) splits at about 12A degrees N near the sea surface. This bifurcation shifts northward with depth, reaching about 20A degrees N at 1 000 m, and then remains nearly unchanged to as deep as 2 000 m. The Luzon Undercurrent (LUC), emerging below the Kuroshio from about 21A degrees N, intensifies southward, with its upper boundary surfacing around 12A degrees N. From there, part of the LUC separates from the coast, while the rest continues southward to join the Mindanao Current (MC). The MC extends to 2 000 m near the coast, and appears to be closely related to the subsurface cyclonic eddies which overlap low-salinity water from the North Pacific. The Mindanao Undercurrent (MUC), carrying waters from the South Pacific, shifts eastward upon approaching the Mindanao coast and eventually becomes part of the eastward undercurrent between 10A degrees N and 12A degrees N at 130A degrees E. In the upper 2 000 dbar, the total westward transport across 130A degrees E between 7.5A degrees N and 18A degrees N reaches 65.4 Sv (1 Sv = 10(-6) m(3)s(-1)), the northward transport across 18A degrees N from Luzon coast to 130A degrees E is up to 35.0 Sv, and the southward transport across 7.5A degrees N from Mindanao coast to 130A degrees E is 27.9 Sv.
关键词	North Pacific North Equatorial Current (Nec) Luzon Undercurrent (Luc) Mindanao Undercurrent (Muc) Volume Transport
学科领域	Limnology ; Oceanography
DOI	10.1007/s00343-009-9240-x
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000272422300033
引用统计	被引频次：23[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/337002/2412
专题	海洋环流与波动重点实验室
作者单位	1.Ocean Univ China, Phys Oceanog Lab, Qingdao 266003, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Xie Lingling,Tian Jiwei,Hu Dunxin,et al. A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2009,27(4):955-965.
APA	Xie Lingling,Tian Jiwei,Hu Dunxin,&Wang Fan.(2009).A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,27(4),955-965.
MLA	Xie Lingling,et al."A quasi-synoptic interpretation of water mass distribution and circulation in the western North Pacific II: Circulation".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 27.4(2009):955-965.

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