Southern Ocean Bottom Water Formation in CMIP5 Models
Heuze, C., Heywood, K.J., Stevens, D.P. and Ridley, J.K. 2013. Southern Ocean bottom water characteristics in CMIP5 models. Geophysical Research Letters: 10.1002/grl.50287.
In the words of the four UK researchers, no model reproduces the process of Antarctic bottom water formation accurately, for "instead of forming dense water on the continental shelf and allowing it to spill off," they say that the models "present extensive areas of deep convection, thus leading to an unrealistic unstratified open ocean."
Due to the fact that Heuze et al. indicate that "bottom water formation processes are poorly represented in ocean models and are a key challenge for improving climate predictions," we should be extremely cautious in accepting what they currently predict about future climate change.
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Russell, J.L., Stouffer, R.J. and Dixon, K.W. 2006. Intercomparison of the southern ocean circulations in IPCC coupled model control simulations. Journal of Climate 19: 4060-4075.