A three-dimensional variational data assimilation scheme in support of coastal ocean observing systems

被引：0

作者：

Li, Zhijin ^{[1
]}

Chao, Yi ^{[1
]}

Farrara, John D. ^{[2
]}

Wang, Xiaochun ^{[2
]}

McWilliams, James C. ^{[3
]}

Ide, Kayo ^{[3
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA

[2] Raytheon Intelligence & Informat Syst, Pasadena, CA USA

[3] Univ Calif Los Angeles, Los Angeles, CA USA

来源：

ASSIMILATION OF REMOTE SENSING AND IN SITU DATA IN MODERN NUMERICAL WEATHER AND ENVIRONMENTAL PREDICTION MODELS | 2007年 / 6685卷

关键词：

data assimilation; coastal ocean; observing system; satellite data; glider; High Frequency radar;

D O I：

10.1117/12.740681

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A three-dimensional variational data assimilation (3DVAR) system (ROMS3DAR) has been developed in the framework of the Regional Ocean Modeling System (ROMS). This system enables the capability of predicting meso- to small-scale variations with temporal scales from hours to days in the coastal oceans. To cope with the particular difficulties that result from complex coastlines and bottom topography, unbalanced flows and sparse observations, ROMS3DVAR utilizes several novel strategies. These strategies include the implementation of three-dimensional anisotropic and inhomogeneous error correlations, application of particular weak dynamic constraints, and implementation of efficient and reliable algorithms for minimizing the cost function. ROMS3DVAR has been implemented in a quasi-real-time fashion in support of both the Southern and Central California Coastal Ocean Observing System (SCCOOS and CenCOOS). ROMS3DVAR assimilates a variety of observations, including satellite sea surface temperatures and sea surface heights, High Frequency (HF) radar velocities, ship reports and other available temperature and salinity profiles. The evaluation showed useful forecast skills.

引用

页数：12

共 19 条

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[2]

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