Look up the Medieval Warm Period. During the Viking Age, temperatures in the North Atlantic were about 1 C higher than today. Interestingly, the end of Norse

Look up the Medieval Warm Period. During the Viking Age, temperatures in the North Atlantic were about 1 C higher than today. Interestingly, the end of Norse settlements in Greenland corresponds pretty closely with the end of this warm period, leading into the Little Ice Age. Its interesting to compare the accounts of the climate and terrain experienced by Leif Erickson in the Vinland Sagas versus Henry Cabot and French explorers who voyaged to the same regions during the 16th/17th centuries.