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Structural preconditioning in optimal analysis
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1998
[PDF-1.11 MB]
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Description:"Variational data assimilation in numerical weather prediction (NWP) encompasses a wide variety of techniques, from the early pioneering methods of Sasaki (1958) and Gandin (1963) to the important recent developments of optimal control theory employing the forecasting model itself as a strong constraint (Talagrand, 1981a,b; Lewis and Derber, 1985; Thacker and Long, 1988) or weak constraint (Ghil et al.,1981; Bennett and Miller, 1991; Bennett et al., 1996, 1997). As the techniques grow in sophistication and as the data types become more diverse, the numerical problems associated with the necessary large scale linear or nonlinear inversions become correspondingly more severe"--Introduction.
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Content Notes:R. James Purser.
"January 1998."
"This is an unreviewed manuscript, primarily intended for informal exchange of information among the NCEP staff members."
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Rights Information:Public Domain
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