TY - SLIDE KW - workshop KW - data assimilation KW - diagnostics KW - systems performance AU - N. Zagar AU - J Tribbla AU - J.G. Anderson AU - K Raeder AU - D. Kleist AU - L. Isaksen AU - D. Tan C1 - Events DA - 2009 LA - eng PY - 2009 TI - Diagnosis of data assimilation systems by using normal modes UR - https://www.ecmwf.int/node/15258 ER -