4D-Var or EnKF


I will compare the advantages and disadvantages of 4D-Var and EnKF, and present several examples of their application to different models, from Lorenz 3-variable model to the Japanese Earth Simulator T159/L48 global model. I will also discuss a low-order approach to deal with model errors.

Eugenia Kalnay, Hong Li, Junjie Liu, Shu-Chih Yang, Chris Danforth and Takemasa Miyoshi