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In the colony's early stages, they kept cattle, sheep, and goats, with around a quarter of their diet from seafood.After the climate became colder and stormier around 1250, their diet steadily shifted towards ocean sources; by around 1300, seal hunting provided over three quarters of their food.The common theory is that Norsemen took advantage of ice-free seas to colonize areas in Greenland and other outlying lands of the far north.From around 985, Vikings founded the Eastern Settlement and Western Settlement, both near the southern tip of Greenland.The authors noted, "The late Holocene records clearly identify Neoglacial events of the Little Ice Age (LIA) and Medieval Warm Period (MWP)." Corals in the tropical Pacific Ocean suggest that relatively cool, dry conditions may have persisted early in the millennium, consistent with a La Niña-like configuration of the El Niño-Southern Oscillation patterns.A reconstruction based on ice cores found the Medieval Warm Period could be distinguished in tropical South America from about 1050 to 1300 that was followed, in the 15th century, by the Little Ice Age.By 1350, there was reduced demand for their exports, and trade with Europe fell away.
Norse colonization of the Americas has been associated with warmer periods.
Some refer to the event as the Medieval Climatic Anomaly as this term emphasizes that climatic effects other than temperature were important.
was the Northern Hemisphere's warmest period since the Roman Warm Period.
Peak temperatures did not rise as high as those from the late 20th century, which were unprecedented in the area during the study period of 1600 years.
Adhikari and Kumon (2001), investigating sediments in Lake Nakatsuna in central Japan, found a warm period from 900 to 1200 that corresponded to the Medieval Warm Period and three cool phases, two of which could be related to the Little Ice Age. studied temperatures in China during the past 2000 years and found high uncertainty prior to the 16th century but good consistency over the last 500 years highlighted by the two cold periods, 1620s–1710s and 1800s–1860s, and the warming during the 20th century.
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Some of the "warm period" events documented below are actually "dry periods" or "wet periods." A 2009 study by Michael E.