Four-dimensional data assimilationBengtsson, L. (1985) Four-dimensional data assimilation. In: Data Assimilation Systems and Observing System Experiments with Particular Emphasis on FGGE. ECMWF, Reading, UK, pp. 1-6. Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. Abstract/SummaryNumerical weather prediction can be regarded as an initial value problem whereby the governing atmospheric equations are integrated forward from fully determined initial values of the meteorological parameters. However, in spite of the considerable improvements of the observing systems in recent years, the initial values are known only incompletely and inaccurately and one of the major tasks of any forecasting centre is to determine the best possible initial state from available observations.
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