TY - GEN AU - Laura Ferranti AU - T.N. Palmer AU - Franco Molteni AU - E. Klinker BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 06/1989 DO - 10.21957/c7a91fa3 LA - eng M1 - 154 PB - ECMWF PP - Shinfield Park, Reading PY - 1989 EP - 37 T2 - ECMWF Technical Memoranda TI - Tropical-extratropical interaction associated with the 30-60 day oscillation and its impacton medium and extended range predictability UR - https://www.ecmwf.int/node/9372 ER -