Ensemble Kalman Filter: Current Status and Potential

摘要: In this chapter we give an introduction to different types of Ensemble Kalman filter, describe the Local Transform Filter (LETKF) as a representative prototype these methods, and several examples how advanced properties applications that have been developed explored for 4D-Var (four-dimensional variational assimilation) can be adapted LETKF without requiring adjoint model. Although filter is less mature than (Kalnay 2003), its simplicity competitive performance with respect suggest it may become method choice.