Stream-coordinate structure of oceanic jets based on merged altimeter data

doi:10.1007/s00343-011-9938-4

IOCAS-IR > 海洋环流与波动重点实验室

	Stream-coordinate structure of oceanic jets based on merged altimeter data
	Sun Che 1; Zhang Linlin 1,2; Yan Xiaomei 1,2
	2011
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	29 期号:1 页码:1-9
文章类型	Article
摘要	The jet structure of the Southern Ocean front south of Australia is studied in stream-coordinate with a new altimeter product-Absolute Dynamic Topography (ADT) from AVISO. The accuracy of the ADT data is validated with the mooring data from a two-year subantarctic-front experiment. It is demonstrated that the ADT is consistent with in-situ measurements and captures the meso-scale activity of the Antarctic Circumpolar Current (ACC). Stream-coordinate analysis of ADT surface geostrophic flows finds that ACC jets exhibit large spatio-temporal variability and do not correspond to particular streamfunction values. In the circumpolar scope ACC jets display a transient fragmented pattern controlled by topographic features. The poleward shift of jet in streamfunction space, as revealed by a streamwise correlation method, indicates the presence of meridional fluxes of zonal momentum. Such cross-stream eddy fluxes concentrate the broad ACC baroclinic flow into narrow jets. Combined with a recent discovery of gravest empirical mode (GEM) in the thermohaline fields, the study clarifies the interrelationship among front, jet and streamfunction in the Southern Ocean.; The jet structure of the Southern Ocean front south of Australia is studied in stream-coordinate with a new altimeter product-Absolute Dynamic Topography (ADT) from AVISO. The accuracy of the ADT data is validated with the mooring data from a two-year subantarctic-front experiment. It is demonstrated that the ADT is consistent with in-situ measurements and captures the meso-scale activity of the Antarctic Circumpolar Current (ACC). Stream-coordinate analysis of ADT surface geostrophic flows finds that ACC jets exhibit large spatio-temporal variability and do not correspond to particular streamfunction values. In the circumpolar scope ACC jets display a transient fragmented pattern controlled by topographic features. The poleward shift of jet in streamfunction space, as revealed by a streamwise correlation method, indicates the presence of meridional fluxes of zonal momentum. Such cross-stream eddy fluxes concentrate the broad ACC baroclinic flow into narrow jets. Combined with a recent discovery of gravest empirical mode (GEM) in the thermohaline fields, the study clarifies the interrelationship among front, jet and streamfunction in the Southern Ocean.
关键词	Oceanic Jet Stream-coordinate Absolute Dynamic Topography (Adt) Gravest Empirical Mode (Gem)
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1007/s00343-011-9938-4
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000286203200001
引用统计	被引频次：7[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/337002/11609
专题	海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Sun Che,Zhang Linlin,Yan Xiaomei. Stream-coordinate structure of oceanic jets based on merged altimeter data[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2011,29(1):1-9.
APA	Sun Che,Zhang Linlin,&Yan Xiaomei.(2011).Stream-coordinate structure of oceanic jets based on merged altimeter data.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,29(1),1-9.
MLA	Sun Che,et al."Stream-coordinate structure of oceanic jets based on merged altimeter data".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 29.1(2011):1-9.

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