Geostrophic Circulation in the Tropical North Pacific Ocean Based on Argo Profiles

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Geostrophic Circulation in the Tropical North Pacific Ocean Based on Argo Profiles
	Yuan, DL ; Zhang, ZC ; Chu, PC ; Dewar, WK
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2014
卷号	44 期号:2 页码:558-575
关键词	Ocean dynamics Circulation/Dynamics Nonlinear dynamics Ocean circulation Transport
ISSN号	0022-3670
通讯作者	dyuan@ms.qdio.ac.cn
中文摘要	Absolute geostrophic currents in the North Pacific Ocean are calculated from the newly gridded Argo profiling float data using the P-vector method for the period of 2004-11. The zonal geostrophic currents based on the Argo profile data are found to be stronger than those based on the traditional World Ocean Atlas 2009 (WOA09) data. A westward mean geostrophic flow underneath the North Equatorial Countercurrent is identified using the Argo data, which is evidenced by sporadic direct current measurements and geostrophic calculations in history. This current originates east of the date line and transports more than 4 x 10(6) m(3) s(-1) of water westward in the subsurface northwestern tropical Pacific Ocean. The authors name this current the North Equatorial Subsurface Current. The transport in the geostrophic currents is compared with the Sverdrup theory and found to differ significantly in several locations. Analyses have shown that errors of wind stress estimation cannot account for all of the differences. The largest differences are found in the area immediately north and south of the bifurcation latitude of the North Equatorial Current west of the date line and in the recirculation area of the Kuroshio and its extension, where nonlinear activities are vigorous. It is, therefore, suggested that the linear dynamics of the Sverdrup theory is deficient in explaining the geostrophic transport of the tropical northwestern Pacific Ocean.
学科主题	Oceanography
收录类别	SCI
资助信息	National Basic Research Program of China [2012CB956000]; NSFC [40888001, 41176019]; CMA [GYHY201306018]; CAS [XDA11010301]; KLOCAW [1208]; Zhoushan Municipal Science and Technology Project [2011C32015, 2012C33033]; Naval Oceanographic Office; NSF [OCE-0960500, OCE-1049131]
原文出处	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000331024500009
公开日期	2014-12-11
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10574]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Yuan, DL,Zhang, ZC,Chu, PC,et al. Geostrophic Circulation in the Tropical North Pacific Ocean Based on Argo Profiles[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2014,44(2):558-575.
APA	Yuan, DL,Zhang, ZC,Chu, PC,&Dewar, WK.(2014).Geostrophic Circulation in the Tropical North Pacific Ocean Based on Argo Profiles.JOURNAL OF PHYSICAL OCEANOGRAPHY,44(2),558-575.
MLA	Yuan, DL,et al."Geostrophic Circulation in the Tropical North Pacific Ocean Based on Argo Profiles".JOURNAL OF PHYSICAL OCEANOGRAPHY 44.2(2014):558-575.