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- W2364110197 abstract "For the prediction of ENSO,the accuracy of the model including the parameters and initial value etc is important,and they can be retrieved by the variational data assimilation methods developed in recent years.But when the nonlinearity of the model is strong enough,the effect of the improvement made by the 4-D variational data assimilation may be poor due to the bad approximation of the tangent linear model to the original model.So the idea of optimal control is introduced in the paper to improve the effect of 4-DVAR in the inversion of the parameters of a nonlinear dynamic ENSO model.The results indicate that when the terminal controlling term originated from the optimal control is added to the cost functional of 4DVAR,the effect of inversion might be obviously improved in comparison with the traditional 4DVAR,especially the phase orbit of model variables is obviously improved.The results in the paper also suggest that the method of 4DVAR in combination with optimal control can not only reduce the error resulted from the inaccuracy of the model parameters but also correct the parameters itself.This gives a good method for modifying the model and improving the quality of prediction of ENSO." @default.
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- W2364110197 date "2007-01-01" @default.
- W2364110197 modified "2023-09-23" @default.
- W2364110197 title "Variational Assimilation for a Coupled Air-Sea Model" @default.
- W2364110197 hasPublicationYear "2007" @default.
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