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Narrative warm/cold variations in continental western Europe, AD 708 -1426
Authors:Zhongwei Yan  Alexandre Pierre  Demarée Gaston
Institution:(1) LASG, Institute of Atmospherie Physics, Chinese Academy of Sciences, 100029 Beijing, China;(2) Royal observatory of Belgium, 1180 Brussels, Belgium;(3) Royal Meteorological Institute of Belgium, 1180 Brussels, Belgium
Abstract:An extended narrative dataset of the Medieval time AD 708-1426 in continental western Europe was set up. Some 30-year-moving mean seasonal temperature deviation series were reconstructed. A- warming trend occurred around AD 1200. During the warm stage, seasonal cycle might be weak due to frequent cool summers. Significant warm summer conditions did not occur until the late 14th century, when the annual temperature level began decreasing. The mean warm season temperature level during the late 14th to the early 15th century might be about 0.3°C higher than the present. It was suggested to cautiously comment on historical climates for different seasons.
Keywords:historical climate  narrative records  Medieval Warm Epoch  seamnal temperature variations
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