TY - CPAPER AU - Peter van Leeuwen BT - ECMWF Workshop on the Role of the Upper Ocean in Medium and Extended Range Forecasting, 13-15 November 2002 CY - Shinfield Park, Reading DA - 2003 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2003 SP - 46 EP - 56 T2 - ECMWF Workshop on the Role of the Upper Ocean in Medium and Extended Range Forecasting, 13-15 November 2002 TI - Ensemble Kalman filters, sequential importance resampling and beyond ER -