Development of an Operational Variational Assimilation Scheme (gtSpecial IssueltData Assimilation in Meteology and Oceanography: Theory and Practice)

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  • Development of an operational variational assimilation scheme
  • Development of an operational variation

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Abstract

The United Kingdom Meteorological Office is developing a variational assimilation for its Unified Model forecast system, which contains a grid-point model, run operationally in global, regional, and mesoscale configurations. Key characteristics of the design are: ·development path from 3-dimensional to 4-dimensional scheme ·global and limited area configurations ·variational analysis of perturbations ·carefully designed, well conditioned 'background' term This paper describes the variational scheme, with some example results from a simple 2-dimensional variational analysis which has been developed as a prototype.

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