Acknowledgements

The authors thank Dr. Takemasa Miyoshi and Prof. Dr. Eugenia Kalnay for providing computer routines for the SPEEDY model and the LETKF system. This paper is a contribution of the Brazilian National Institute of Science and Technology (INCT) for Climate Change funded by CNPq Grant Number 573797/2008-0 e FAPESP Grant Number 2008/57719-9. Author HFCV also thanks to the CNPq (Grant number 311147/2010–0).
