Annual temperatures during the last 2485 years in the mid-eastern Tibetan Plateau inferred from tree rings |
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| Authors: | Yu Liu ZhiSheng An Hans W Linderholm DeLiang Chen HuiMing Song QiuFang Cai JunYan Sun Hua Tian |
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| Institution: | (1) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710075, China;(2) Regional Climate Group, Department of Earth Sciences, University of Gothenburg, 40530 Gothenburg, Sweden;(3) Department of Environment Science and Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;(4) Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | By combining living trees and archaeological wood, the annual mean temperatures were reconstructed based on ring-width indices
of the mid-eastern Tibetan Plateau for the past 2485 years. The climate variations revealed by the reconstruction indicate
that there were four periods to have average temperatures similar to or even higher than that mean of 1970 to 2000 AD. A particularly
notable rapid shift from cold to warm, we call it the “Eastern Jin Event”, occurred from 348 AD to 413 AD. Calculation results
show that the temperature variations over the mid-eastern Tibetan Plateau are not only representative for large parts of north-central
China, but also closely correspond to those of the entire Northern Hemisphere over long time scales. During the last 2485
years, the downfall of most major dynasties in China coincides with intervals of low temperature. Compared with the temperature
records in other regions of China during the last 1000 years, this reconstruction from the Tibetan Plateau shows a significant
warming trend after the 1950s.
Supported by National Natural Science Foundation of China (Grant Nos. 40525004, 40599420, 40890051), National Basic Research
Program of China (Grant Nos. 2007BAC30B00, 2004CB720200, 2006CB400503) and the Swedish International Development Cooperation
Agency (SIDA, Grant to Hans W. Linderholm) |
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| Keywords: | mid-eastern Tibetan Plateau tree rings temperature variations dynasty’ s downfall |
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