Water mass characteristics in the western North Pacific based on a streamfunction projection

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Water mass characteristics in the western North Pacific based on a streamfunction projection
	Ma Xiao1,2 ; Sun Che 1
刊名	SCIENCE CHINA-EARTH SCIENCES
	2015-11-01
卷号	58 期号:11 页码:2067-2077
关键词	streamfunction projection gravest empirical mode water masses western North Pacific
英文摘要	A streamfunction projection method called gravest empirical mode (GEM) is applied to the hydrographic section at 137A degrees E to filter out eddy noises in the western North Pacific and derive quantitative ensemble-average water mass properties in the North Equatorial Current region. The GEM fields capture more than 80% of total property variances in the thermocline layer. The core layer structures of key water masses, including the North Pacific Tropical Water (NPTW) and the North Pacific Intermediate Water (NPIW), are examined with a definition of water mass boundary based on property gradient. It shows that a tongue of maximal root-mean-square (RMS) residual exists in the upper half of NPIW for all water properties. These subsurface RMS tongues appear to be close to sharp property gradients. It is the first time a GEM diagnosis is applied to nutrient data, which reveals a drastic difference of N/P reaction rate ratio above and below the maximal-nutrient core at 1250 m. Additionally, a GEM velocity reconstruction successfully produces the North Equatorial Undercurrent (NEUC), demonstrating the stable thermal-wind nature of this newly-discovered current.
收录类别	SCI
语种	英语
WOS记录号	WOS:000363258600016
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/73938]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ma Xiao,Sun Che. Water mass characteristics in the western North Pacific based on a streamfunction projection[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(11):2067-2077.
APA	Ma Xiao,&Sun Che.(2015).Water mass characteristics in the western North Pacific based on a streamfunction projection.SCIENCE CHINA-EARTH SCIENCES,58(11),2067-2077.
MLA	Ma Xiao,et al."Water mass characteristics in the western North Pacific based on a streamfunction projection".SCIENCE CHINA-EARTH SCIENCES 58.11(2015):2067-2077.