TY - GEN AU - Marta Janiskova AU - Philippe Lopez BT - ECMWF Newsletter DA - 05/2023 DO - 10.21957/mjb5e1d9n6 M1 - 175 PY - 2023 SE - Earth System Science SP - 20 EP - 26 T2 - ECMWF Newsletter TI - Linearised physics: the of ECMWF’s 4D-Var UR -   ER -