Earlier papers in this series introduced methods of studying past climate change, the historicity of the Medieval Warm Period and Little Ice Age, importance of the Little Ice Age in understanding climate change and constraining climatic models, and the importance of the North Atlantic region in understanding and applying constraints on climatic and glacial models. Earlier papers included summaries of the effects of the Little Ice Age in Iceland, Norway, and Greenland, and how the data obtained from the Little Ice Age should constrain our study of climate change. This paper presents an application of Little Ice Age data to our understanding of the inferred postdiluvial Great Ice Age.