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	Application of a recursive filter to a three-dimensional variational ocean data assimilation system
	Liu Ye1,2; Yan Changxiang1
刊名	Advances in atmospheric sciences
	2010-03-01
卷号	27期号:2页码:293-302
关键词	Recursive filter Background error covariance The ocean variational assimilation system (ovals)
ISSN号	0256-1530
DOI	10.1007/s00376-009-8112-9
通讯作者	Liu ye(liuye@mail.iap.ac.cn)
英文摘要	In order to improve the efficiency of the ocean variational assimilation system (ovals), which has been widely used in various applications, an improved ovals (ovals2) is developed based on the recursive filter (rf) algorithm. the first advantage of ovals2 is that memory storage can be substantially reduced in practice because it implicitly computes the background error covariance matrix; the second advantage is that there is no inversion of the background error covariance by preconditioning the control variable. for comparing the effectiveness between ovals2 and ovals, a set of experiments was implemented by assimilating expendable bathythermograph (xbt) and argo data into the tropical pacific circulation model. the results show that the efficiency of ovals2 is much higher than that of ovals. the computational time and the computer storage in the assimilation process were reduced by 83% and 77%, respectively. additionally, the corresponding results produced by the rf are almost as good as those obtained by ovals. these results prove that ovals2 is suitable for operational numerical oceanic forecasting.
WOS关键词	TROPICAL PACIFIC-OCEAN ; GENERAL-CIRCULATION MODEL ; WATER-VAPOR OBSERVATIONS ; STATISTICAL-ANALYSIS ; OBJECTIVE ANALYSIS ; NUMERICAL ASPECTS ; BACKGROUND ERROR ; SEA ; COVARIANCES ; SCHEME
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000274542800009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2415325
专题	中国科学院大学
通讯作者	Liu Ye
作者单位	1.Chinese Acad Sci, Int Ctr Climate & Environm Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu Ye,Yan Changxiang. Application of a recursive filter to a three-dimensional variational ocean data assimilation system[J]. Advances in atmospheric sciences,2010,27(2):293-302.
APA	Liu Ye,&Yan Changxiang.(2010).Application of a recursive filter to a three-dimensional variational ocean data assimilation system.Advances in atmospheric sciences,27(2),293-302.
MLA	Liu Ye,et al."Application of a recursive filter to a three-dimensional variational ocean data assimilation system".Advances in atmospheric sciences 27.2(2010):293-302.

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