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	Effects of optimal initial errors on predicting the seasonal reduction of the upstream kuroshio transport
	Zhang, Kun1,2; Wang, Qiang1,3; Mu, Mu1,3; Liang, Peng1,2
刊名	Deep-sea research part i-oceanographic research papers
	2016-10-01
卷号	116页码:220-235
关键词	Initial errors The upstream kuroshio transport Cnop
ISSN号	0967-0637
DOI	10.1016/j.dsr.2016.08.008
通讯作者	Wang, qiang(wangqiang@qdio.ac.cn)
英文摘要	With the regional ocean modeling system (roms), we realistically simulated the transport variations of the upstream kuroshio (referring to the kuroshio from its origin to the south of taiwan), particularly for the seasonal transport reduction. then, we investigated the effects of the optimal initial errors estimated by the conditional nonlinear optimal perturbation (cnop) approach on predicting the seasonal transport reduction. two transport reduction events (denoted as event i and event 2) were chosen, and cnop1 and cnop2 were obtained for each event. by examining the spatial structures of the two types of cnops, we found that the dominant amplitudes are located around (128 degrees e, 17 degrees n) horizontally and in the upper 1000 m vertically. for each event, the two cnops caused large prediction errors. specifically, at the prediction time, cnop1 (cnop2) develops into an anticyclonic (cyclonic) eddy-like structure centered around 124 degrees e, leading to the increase (decrease) of the upstream kuroshio transport. by investigating the time evolution of the cnops in event 1, we found that the eddy-like structures originating from east of luzon gradually grow and simultaneously propagate westward. the eddy-energetic analysis indicated that the errors obtain energy from the background state through barotropic and baroclinic instabilities and that the latter plays a more important role. these results suggest that improving the initial conditions in east of luzon could lead to better prediction of the upstream kuroshio transport variation. (c) 2016 elsevier ltd. all rights reserved.
WOS关键词	NORTH EQUATORIAL CURRENT ; NONLINEAR OPTIMAL PERTURBATION ; PACIFIC SUBTROPICAL COUNTERCURRENT ; WESTERN BOUNDARY CURRENTS ; TARGETED OBSERVATION ; OCEAN CIRCULATION ; LARGE MEANDER ; INTERANNUAL VARIABILITY ; LUZON STRAIT ; EDDY FIELD
WOS研究方向	Oceanography
WOS类目	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000385326700019
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2374904
专题	中国科学院大学
通讯作者	Wang, Qiang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kun,Wang, Qiang,Mu, Mu,et al. Effects of optimal initial errors on predicting the seasonal reduction of the upstream kuroshio transport[J]. Deep-sea research part i-oceanographic research papers,2016,116:220-235.
APA	Zhang, Kun,Wang, Qiang,Mu, Mu,&Liang, Peng.(2016).Effects of optimal initial errors on predicting the seasonal reduction of the upstream kuroshio transport.Deep-sea research part i-oceanographic research papers,116,220-235.
MLA	Zhang, Kun,et al."Effects of optimal initial errors on predicting the seasonal reduction of the upstream kuroshio transport".Deep-sea research part i-oceanographic research papers 116(2016):220-235.

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