TY - GEN AU - Patrick Laloyaux AU - Eric de Boisseson AU - Per Dahlgren BT - ECMWF newsletter C1 - Research DA - 2017 DO - 10.21957/ffs36birj2 IS - 150 LA - eng PY - 2017 SE - Meteorology SP - 25 EP - 30 T2 - ECMWF newsletter TI - CERA-20C: An Earth system approach to climate reanalysis UR - https://www.ecmwf.int/node/18164 ER -