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2009: A comparison of variational and ensemble-based data assimilation systems for reanalysis of sparse observations (1991)
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BibTeX
@MISC{Whitaker912009:a,
author = {Jeffrey S. Whitaker and Gilbert P. Compo},
title = {2009: A comparison of variational and ensemble-based data assimilation systems for reanalysis of sparse observations},
year = {1991}
}
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Abstract
An observing system experiment, simulating a surface-only observing network representative of the 1930s, is carried out with three- and four-dimensional variational data assimilation systems (3D-VAR and 4D-VAR) and an ensemble-based data assimilation system (EnsDA). It is found that 4D-VAR and EnsDA systems produce analyses of comparable quality and that both are much more accurate than the analyses produced by the 3D-VAR system. The EnsDA system also produces useful estimates of analysis error, which are not directly available from the variational systems. 1.
