Mindanao Current/Undercurrent in an eddy-resolving GCM

doi:10.1029/2011JC007838

IOCAS-IR > 海洋环流与波动重点实验室

	Mindanao Current/Undercurrent in an eddy-resolving GCM
	Qu, Tangdong 1; Chiang, Tzu-Ling 1,2; Wu, Chau-Ron 2; Dutrieux, Pierre 3; Hu, Dunxin 4; Qu, TD (reprint author), Univ Hawaii Manoa, Int Pacific Res Ctr, SOEST, 1680 East West Rd, Honolulu, HI 96822 USA.
	2012-06-29
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN	2169-9275
卷号	117 页码:C06026
文章类型	Article
摘要	Analysis of results from an eddy-resolving general circulation model showed two subsurface velocity cores in the mean within the depth range between 400 and 1000 m below the Mindanao Current (MC). One is confined to the inshore edge at about 126.8 degrees E and connected with the Sulawesi Sea. The other takes place somewhat offshore around 127.7 degrees E, being closely related to the intrusion of South Pacific water. Both cores are referred to as the Mindanao Undercurrent (MUC). The MC/MUC is approximately a geostrophic flow, except on the inshore edge of the MUC where up to 50% of the mean flow can be explained by ageostrophic dynamics. In contrast with the well-defined southward flowing MC, the MUC is of high velocity variance relative to the mean. Empirical orthogonal function (EOF) analysis shows that approximately 60% of the total velocity variance is associated with two meandering modes, with their major signatures in the subthermocline. The dominant time scale of variability is 50-100 days. An ensemble of these meso-scale fluctuations provides a northward freshwater flux on the offshore edge of the Philippine coast, which to a certain extent explains why water of South Pacific origin appears to extend farther northward than the mean MUC. In the offshore velocity core of the MUC, for example, eddy induced freshwater flux is equivalent to a mean flow of about 0.3 m s(-1) in the density range between 26.9 and 27.3 kg m(-3), which is greater than the mean current by a factor of 6.
关键词	North Equatorial Current Antarctic Intermediate Water Pacific-ocean Circulation Western Boundary Currents Indonesian Throughflow Tropical Pacific Kuroshio East Current Bifurcation Mesoscale Eddies Philippine Coast
学科领域	Oceanography
DOI	10.1029/2011JC007838
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000306003400001
引用统计	被引频次：49[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/337002/12170
专题	海洋环流与波动重点实验室
通讯作者	Qu, TD (reprint author), Univ Hawaii Manoa, Int Pacific Res Ctr, SOEST, 1680 East West Rd, Honolulu, HI 96822 USA.
作者单位	1.Univ Hawaii Manoa, Int Pacific Res Ctr, SOEST, Honolulu, HI 96822 USA 2.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan 3.Univ Hawaii Manoa, Dept Oceanog, SOEST, Honolulu, HI 96822 USA 4.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Qu, Tangdong,Chiang, Tzu-Ling,Wu, Chau-Ron,et al. Mindanao Current/Undercurrent in an eddy-resolving GCM[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2012,117:C06026.
APA	Qu, Tangdong,Chiang, Tzu-Ling,Wu, Chau-Ron,Dutrieux, Pierre,Hu, Dunxin,&Qu, TD .(2012).Mindanao Current/Undercurrent in an eddy-resolving GCM.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,117,C06026.
MLA	Qu, Tangdong,et al."Mindanao Current/Undercurrent in an eddy-resolving GCM".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 117(2012):C06026.

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