TY - GEN AU - H. Sävijärvi BT - ECMWF Technical Memoranda CY - Shinfield Park, Reading DA - 07/1981 DO - 10.21957/z87n3wrlw LA - eng M1 - 38 PB - ECMWF PP - Shinfield Park, Reading PY - 1981 EP - 16 T2 - ECMWF Technical Memoranda TI - Winter and summer circulation statistics based on ECMWF operational analyses andforecasts UR - https://www.ecmwf.int/node/12509 ER -