TY - GEN AU - S. Tibaldi AU - J.-F. Geleyn BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 08/1981 DO - 10.21957/p68g6dnfz LA - eng M1 - 40 PB - ECMWF PP - Shinfield Park, Reading PY - 1981 EP - 71 T2 - ECMWF Technical Memoranda TI - The production of a new orography, land-sea mask and associated climatological surface fields for operational purpose UR - https://www.ecmwf.int/node/12715 ER -