claim: The original global temperature schematic which appeared in the IPCC First Assessment Report and seemed to show the Medieval Warm Period ( MWP ) hotter than Present was based on the central England temperature record, and ended in the 1950s.
evidence: The Medieval Warm Period ( MWP ) also known as the Medieval Climate Optimum, or Medieval Climatic Anomaly was a time of warm climate in the North Atlantic region lasting from c. 950 to c. 1250.