Evidence is presented that coupled ocean-atmosphere models can already outscore computationally less expensive atmospheric models. However, if the atmospheric models are forced with highly skillful SST predictions, they may still be a very strong competitor for coupled models.
Reference:
Landman, WA, DeWitt, D, Lee, D-E, Beraki, A.F. and Lotter, D. South African seasonal rainfall prediction performance by a coupled ocean-atmosphere model. SATREPS Symposium on Climate prediction and information for the Society, The University of Aizu, Aizu, Japan, 16-18 December 2010
Landman, W., DeWitt, D., Lee, D., Beraki, A. F., & Lotter, D. (2010). South African seasonal rainfall prediction performance by a coupled ocean-atmosphere model. http://hdl.handle.net/10204/5886
Landman, WA, D DeWitt, D-E Lee, Asmerom F Beraki, and D Lotter. "South African seasonal rainfall prediction performance by a coupled ocean-atmosphere model." (2010): http://hdl.handle.net/10204/5886
Landman W, DeWitt D, Lee D, Beraki AF, Lotter D, South African seasonal rainfall prediction performance by a coupled ocean-atmosphere model; 2010. http://hdl.handle.net/10204/5886 .