Variational data assimilation in the tropics: The impact of a background-error constraint
✍ Scribed by Nedjeljka Žagar; Nils Gustafsson; Erland Källén
- Book ID
- 118729199
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 852 KB
- Volume
- 130
- Category
- Article
- ISSN
- 0035-9009
- DOI
- 10.1256/qj.03.13
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## Abstract This paper studies the sensitivity of global ocean analyses to two flow‐dependent formulations of the background‐error standard deviations (σ^b^) for temperature and salinity in a three‐dimensional variational data assimilation (3D‐Var) system. The first formulation is based on an empir
## Abstract This article reviews a range of leading methods to model the background error covariance matrix (the **B**‐matrix) in modern variational data assimilation systems. Owing partly to its very large rank, the **B**‐matrix is impossible to use in an explicit fashion in an operational setting