Céline Robert, Eric Blayo, Jacques Verron. Reduced-order 4D-Var: a preconditioner for the Incremental 4D-Var data assimilation method.
Geophysical Research Letters, American Geophysical Union, 2006, 33 (L18609), pp.1-4.
⟨10.1029/2006GL026555⟩.
⟨hal-00172926⟩