TY - SLIDE KW - annual seminar AU - Philippe Lopez AU - Marta Janiskova BT - ECMWF Annual Seminar 2015 C1 - Events DA - 2015 LA - eng PY - 2015 T2 - ECMWF Annual Seminar 2015 T3 - ECMWF Annual Seminar TI - The challenges of Linearized Physics (LP) in Data Assimilation (DA) ER -