Observation of the abyssal western boundary current in the Philippine Sea

IOCAS-IR

	Observation of the abyssal western boundary current in the Philippine Sea
	Zhai FG(翟方国); Wang QY(王庆业); Hu DX(胡敦欣); Guo XG(郭小钢)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2014-09-15
出版年	2014
卷号	v.32 期号:05 页码:218-227
文献类型	CNKI期刊论文
摘要	Mooring observations were conducted from July 16, 2011 to March 30, 2012 east of Mindanao, Philippines(127°2.8′E, 8°0.3′N) to observe the abyssal current at about 5600 m deep and 500 m above the ocean bottom. Several features were revealed: 1) the observed abyssal current was highly variable with standard deviations of 57.3 mm/s and 34.0 mm/s, larger than the mean values of-31.9 and 16.6 mm/s for the zonal and meridional components, respectively; 2) low-frequency current longer than 6 days exhibited strong seasonal variation, flowing southeastward(mean flow direction of 119.0° clockwise from north) before about October 1, 2011 and northwestward(mean flow direction of 60.5° counter-clockwise from north) thereafter; 3) the high-frequency flow bands were dominated by tidal currents O 1, K 1, M 2, and S 2, and near-inertial currents, whose frequencies were higher than the local inertial frequency. The two diurnal tidal constituents were much stronger than the two semidiurnal ones. This study provides for the first time an observational insight into the abyssal western boundary current east of Mindanao based on long-term observations at one site. It is meaningful for further research into the deep and abyssal circulation over the whole Philippine Sea and the 3D structure of the western boundary current system in this region. More observational and high-resolution model studies are needed to examine the spatial structure and temporal variation of the abyssal current over a much larger space and longer period, their relation to the upper-layer circulation, and the underlying dynamics.
关键词	abyssal current Philippine Sea mooring observation
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;
CNKI专题名称	海洋学;
分类号	P714.3
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the China Postdoctoral Science Foundation(No.2013M530331) ; the Project of State Strategic Program of Global Change(No.2013CB956202)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/190310
专题	中国科学院海洋研究所
作者单位	1.ThirdInstituteofOceanography,StateOceanicAdministration 2.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Zhai FG,Wang QY,Hu DX,et al. Observation of the abyssal western boundary current in the Philippine Sea. 2014.