Researchers have added "climate change" to the list of possible reasons that the Vikings suddenly abandoned Greenland around 1400. Analysis of lake sediment cores has revealed that there was a sharp cooling trend from about 1100 onwards.
Crop and livestock yields would have decreased significantly from the warmer days in the 10th century when the Norse first arrived on the island. Conflict with the Inuit, economic pressures, and natural disasters are other possible reasons for the exodus.
Scientists also found another cooling trend 3,000 years ago which may have contributed to the decline of the pre-historic Saqqaq people.