TEMPERATURE VARIATIONS DURING THE SONG AND YUAN DYNASTIES (960～1368A.D.)IN THE EASTERN PART OF NORTH WEST CHINA
The eastern part of North West China includes the middle and north part of Shaanxi Province and Ningxia Autonomous Region, the southeast part of Gansu Province and the west part of Henan Province. Temperature variations during the Song and Yuan Dynasties(960 ～ 1368A. D. )in this region were estimated in terms of historical records and natural evidence such as north winter wheat planting limit boundaries, farming systems, extreme weather,phonological change,tree rings,and lake sediments. As a result,such a picture of climate variations was revealed: the climate around 960A. D. was similar to that during 1951 ～ 1980; the climate during 960s ～ 1010s became gradually warm; the temperature during 1040s ～1110s was at least 0. 5℃ higher than that of 1951 ～ 1980; the climate after 1110s became cold; the temperature during the middle of 12th century,especially in the period of 1170s～ 1180s was 0. 8 ～ 1. 2℃ lower than that of 1951～ 1980 ; the climate in the end of 12th century became again warm and the temperature was 1.4℃ higher than 1951 ～1980; and the climate after 1260A. D. began becoming cold and by he end of 13th century there was a cold time. The climate picture can be correlated not only with cold-warm changes,but also with those in East China. The difference is only that the temperature decrease in this region was more significant than that in East China. It could be related to the geographical location of the eastern part of North West China. Perhaps, this region is very sensitive to global climatic change. In addition, because of very limited records, temperature reconstruction series has large uncertainty and time resolution was varies from 10 to 50-years.
Song and Yuan dynastieseastern part of North West Chinatemperature variations
NETL
NSTL
万方数据
维普
