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The primary focus of PMIP efforts so far has been to look at changes in the mean climate and how these are modelled. However, GCMs also simulate internal variability about that mean state. Its study requires both high resolution proxy data and the storing of larger model datasets - which has been developing through the PMIP iterations.
The purpose of this working group is to encourage and facilitate the study of past climate variability: either amongst models or between models and data.
Historical footnote: group initiated at the PMIP3 2012 Crewe meeting.