Ocean Data Assimilation with Background Error Covariance Derived from OGCM Outputs

The background error covariance plays an important role in modern data assimilation and analysissystems by determining the spatial spreading of information in the data. A novel method based on modeloutput is proposed to estimate background error covariance for use in Optimum Interpolation. At everym...

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Published inAdvances in atmospheric sciences Vol. 21; no. 2; pp. 181 - 192
Main Author 符伟伟 周广庆 王会军 队干部
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.03.2004
Nansen-Zhu International Research Centre (NZC), Institute of Atmospheric Physics,Chinese Academy of Sciences, Beijing 100029
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ISSN0256-1530
1861-9533
DOI10.1007/BF02915704

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Abstract The background error covariance plays an important role in modern data assimilation and analysissystems by determining the spatial spreading of information in the data. A novel method based on modeloutput is proposed to estimate background error covariance for use in Optimum Interpolation. At everymodel level, anisotropic correlation scales are obtained that give a more detailed description of the spatialcorrelation structure. Purthermore, the impact of the background field itself is included in the backgrounderror covariance. The methodology of the estimation is presented and the structure of the covariance isexamined, The results of 20-year assimilation experiments are compared with observations from TOGATAO (The Tropical Ocean-Global Atmosphere~Tropical Atmosphere Ocean) array and other analysis data.
AbstractList The background error covariance plays an important role in modern data assimilation and analysis systems by determining the spatial spreading of information in the data. A novel method based on model output is proposed to estimate background error covariance for use in Optimum Interpolation. At every model level, anisotropic correlation scales are obtained that give a more detailed description of the spatial correlation structure. Furthermore, the impact of the background field itself is included in the background error covariance. The methodology of the estimation is presented and the structure of the covariance is examined. The results of 20-year assimilation experiments are compared with observations from TOGA-TAO (The Tropical Ocean-Global Atmosphere-Tropical Atmosphere Ocean) array and other analysis data.
The background error covariance plays an important role in modern data assimilation and analysis systems by determining the spatial spreading of information in the data. A novel method based on model output is proposed to estimate background error covariance for use in Optimum Interpolation. At every model level, anisotropic correlation scales are obtained that give a more detailed description of the spatial correlation structure. Furthermore, the impact of the background field itself is included in the background error covariance. The methodology of the estimation is presented and the structure of the covariance is examined. The results of 20-year assimilation experiments are compared with observations from TOGATAO (The Tropical Ocean-Global Atmosphere-Tropical Atmosphere Ocean) array and other analysis data.
The background error covariance plays an important role in modern data assimilation and analysis systems by determining the spatial spreading of information in the data. A novel method based on model output is proposed to estimate background error covariance for use in Optimum Interpolation. At every model level, anisotropic correlation scales are obtained that give a more detailed description of the spatial correlation structure. Furthermore, the impact of the background field itself is included in the background error covariance. The methodology of the estimation is presented and the structure of the covariance is examined. The results of 20-year assimilation experiments are compared with observations from TOGA-TAO (The Tropical Ocean-Global Atmosphere-Tropical Atmosphere Ocean) array and other analysis data.[PUBLICATION ABSTRACT]
The background error covariance plays an important role in modern data assimilation and analysissystems by determining the spatial spreading of information in the data. A novel method based on modeloutput is proposed to estimate background error covariance for use in Optimum Interpolation. At everymodel level, anisotropic correlation scales are obtained that give a more detailed description of the spatialcorrelation structure. Purthermore, the impact of the background field itself is included in the backgrounderror covariance. The methodology of the estimation is presented and the structure of the covariance isexamined, The results of 20-year assimilation experiments are compared with observations from TOGATAO (The Tropical Ocean-Global Atmosphere~Tropical Atmosphere Ocean) array and other analysis data.
Author 符伟伟 周广庆 王会军 队干部
AuthorAffiliation Nansen-ZhuInternationalResearchCentre(NZC).InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029
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crossref_primary_10_1002_qj_4833
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  volume-title: 11th Conference on Interations of the Sea and Atmosphere
  year: 2001
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– volume: 30
  start-page: 294
  year: 2000
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  publication-title: J. Phys. Oceanogr.
  doi: 10.1175/1520-0485(2000)030<0294:ASODAA>2.0.CO;2
– volume: 50A
  start-page: 42
  year: 1998
  ident: BF02915704_CR18
  publication-title: Tellus
  doi: 10.1034/j.1600-0870.1998.00004.x
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Snippet The background error covariance plays an important role in modern data assimilation and analysissystems by determining the spatial spreading of information in...
The background error covariance plays an important role in modern data assimilation and analysis systems by determining the spatial spreading of information in...
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SubjectTerms Atmosphere
Data assimilation
Data collection
Meteorology
协方差
数字模拟
数据同化
海洋调查
Title Ocean Data Assimilation with Background Error Covariance Derived from OGCM Outputs
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