TY - CPAPER AU - A.T. Weaver AU - S. Ricci BT - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 CY - Shinfield Park, Reading DA - 2003 LA - eng PB - ECMWF PP - Shinfield Park, Reading PY - 2003 SP - 327 EP - 340 T2 - Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003 TI - Constructing a background-error correlation model using generalized diffusion operators ER -