globalchange  > 气候减缓与适应
DOI: 10.1002/2017JC013172
Scopus记录号: 2-s2.0-85040711699
论文题名:
Reduced-Rank Array Modes of the California Current Observing System
作者: Moore A.M.; Arango H.G.; Edwards C.A.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:1
起始页码: 452
结束页码: 465
语种: 英语
英文关键词: 4D-Var ; data assimilation
Scopus关键词: array ; covariance analysis ; data assimilation ; matrix ; model ; observational method ; quantitative analysis ; California Current ; Pacific Ocean ; United States
英文摘要: The information content of the ocean observing array spanning the U.S. west coast is explored using the reduced-rank array modes (RAMs) derived from a four-dimensional variational (4D-Var) data assimilation system covering a period of three decades. RAMs are an extension of the original formulation of array modes introduced by Bennett (1985) but in the reduced model state-space explored by the 4D-Var system, and reveal the extent to which this space is activated by the observations. The projection of the RAMs onto the empirical orthogonal functions (EOFs) of the 4D-Var background error correlation matrix provides a quantitative measure of the effectiveness of the measurements in observing the circulation. It is found that much of the space spanned by the background error covariance is unconstrained by the present ocean observing system. The RAM spectrum is also used to introduce a new criterion to prevent 4D-Var from overfitting the model to the observations. © 2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114838
Appears in Collections:气候减缓与适应

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作者单位: Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, CA, United States; Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States

Recommended Citation:
Moore A.M.,Arango H.G.,Edwards C.A.. Reduced-Rank Array Modes of the California Current Observing System[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)
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