@phdthesis{74199, author = {G. Desroziers and L. Berre and B. Chapnik}, title = {Objective validation of data assimilation systems: diagnosing sub-optimality}, year = {2010}, journal = {Seminar on Diagnosis of Forecasting and Data Assimilation Systems, 7 - 10 September 2009}, pages = {151-162}, month = {2010}, publisher = {ECMWF}, address = {Shinfield Park, Reading}, language = {eng}, }