| Methods for dealing with spurious covariances arising from small samples in ensemble data assimilation |
| Ensemble data assimilation |
| Ensemble Kalman Filter |
| Ensemble Kalman Filter |
| Ensemble Kalman Filter |
| Ensemble Kalman Filter |
| Consequences of Sampling Error |
| Mis-specification of background-error covariance |
| Effect of localization in a simplied GCM (1) |
| Effect of localization in a simplied GCM (2) |
| Effect of localization in a simplied GCM (3) |
| Covariance localization increases rank of Pb |
| Alternative to localization |
| Two EnKF approaches |
| Outstanding issues |
| Localization and Balance Analysis of single zonal wind observation, using idealized nondivergent and geostrophically balanced covariances. |
| Flow Dependent Localization (Hodyss and Bishop, QJR) |
| Flow Dependent Localization |
| Slide 19 |
| ÒSENCORPÓ Recipe |
| Hierarchical Ensemble Filter |
| Conclusions |