TY - CPAPER AU - A.T. Weaver 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 - 57 EP - 66 T2 - ECMWF Workshop on the Role of the Upper Ocean in Medium and Extended Range Forecasting, 13-15 November 2002 TI - 3D-Var and 4D-Var approaches to ocean data assimilation ER -