The
Medieval Warm Period (
MWP),
Medieval Climate Optimum, or
Medieval Climatic Anomaly was a time of warm
climate in the
North Atlantic region that may also have been related to other
climate events around the world during that time, including
China and other areas, lasting from about 950 to 1250. It was followed by a cooler period in the
North Atlantic termed the
Little Ice Age. Some refer to the event as the Medieval Climatic Anomaly as this term emphasizes that effects other than temperature were important.