Optimal Determination Of Nudging Coefficients

Abstract : A low-cost method for dealing with model errors in 4D variational assimilation using the innovation residual is presented and formally compared to the Kalman filter. This method is applied to two models, first a burger equation to calibrate the method and second to a more relevant Shallow water equations model. It is shown that compared to the classical 4D-Var results, this new method provides a sizeable improvement.
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https://hal.inria.fr/inria-00325360
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Arthur Vidard, François-Xavier Le Dimet, Andrea Piacentini. Optimal Determination Of Nudging Coefficients. Tellus A, Co-Action Publishing, 2003, 55 (1), pp.1--15. ⟨inria-00325360⟩

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