The Reconstruction of Paleovegetation and Paleoclimate in the Late Pliocene of West Yunnan, China |
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Authors: | Xiang-Yu Kou David K Ferguson Jing-Xian Xu Yu-Fei Wang Cheng-Sen Li |
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Institution: | (1) Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, P.R. China;(2) The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi‘an, 710075, P.R. China;(3) College of Resources Science and Technology, Beijing Normal University, 100875 Beijing, P.R. China;(4) Department of Paleontology, University of Vienna, Althanstraβe 14, A-1090 Vienna, Austria;(5) Beijing Museum of Natural History, Beijing, 100050, P.R. China;(6) Graduate School of the Chinese Academy of Sciences, Beijing, 100049, P.R. China |
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Abstract: | The Eryuan palynoflora from the Late Pliocene of western Yunnan, China is described in this paper, and is compared with two contemporary palynofloras from Yangyi and Longling. The palynological data of the three locations are analyzed to reconstruct the climatic parameters of these areas at that time by using the Coexistence Approach. The Late Pliocene climatic parameters of Eryuan are estimated, i.e., the mean annual temperature ranged from 13.3 to 18.6∘C, the mean temperature of the warmest month from 24.6 to 27.5∘C, the mean temperature of the coldest month from 1.9 to 12.1∘C, the difference in temperatures of coldest and warmest month from 14.2 to 16.6∘C, the mean annual precipitation from 619.9 to 1484.3 mm, the mean maximum monthly precipitation from 143.8 to 245.6 mm, and the mean minimum monthly precipitation from 12.7 to 16.4 mm. Both paleovegetation and paleoclimate of the three localities are compared with the modern data at each location. The present study suggests a MAT decrease accompanied by a doubling of the MAP in the Longling area between the Late Pliocene and the present. This seems to be related to the uplift of Gaoligong Mountain in Longling which is now part of the eastern portion (Western Yunnan) of the Tibetan Plateau. |
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