The authors thank the PMIP2 international modeling groups for providing their data (http://pmip2.lsce.ipsl.fr), and participants of the Ensembles project that make possible the simulations of CNRM-CM3. GR, AL, and GL acknowledge the support of ANR through contract ANR-JCJC-06-139163. GL is also supported by a grant from the MAIF foundation, and MK by the project ANR-BLANC IDEGLACE.
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