On the Upper Quaternary paleoecology of Eastern Tibet——Preliminary results of an expedition to the Eastern Tibetan Plateau, 1992  

作　　者：Burkhard Frenzel 李椷 刘世建 

机构地区：[1]Department of Botany (210), University Hohenbeim, D-70593 Stuttgart, Germany [2]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041 China

出　　处：《Science China Chemistry》1995年第4期484-494,共11页中国科学（化学英文版）

摘　　要：During a joint Chinese-German expedition through West Sichuan and the eastern half of Qinghai-Xizang Plateau, in the summer of 1992, geological and geomorphological field observations proved that there did not exist a Pleistocene inland ice. This was corroborated by several TL-data and by the analysis of quartz-grain surfaces by means of the scanning electron microscope. Just like during the 1989 expedition more than 1 250 year-old living juniper trees were found at about 4600 m a.s.l. to the northwest of Qamdo, which helps to understand the climate history of the last 1 500 a there. Dendrochronological investigations on lateral and end-moraines prove that in the area the recent glacier advances happened between 1 820 and 1 860 A.D.During a joint Chinese-German expedition through West Sichuan and the eastern half of Qinghai-Xizang Plateau, in the summer of 1992, geological and geomorphological field observations proved that there did not exist a Pleistocene inland ice. This was corroborated by several TL-data and by the analysis of quartz-grain surfaces by means of the scanning electron microscope. Just like during the 1989 expedition more than 1 250 year-old living juniper trees were found at about 4600 m a.s.l. to the northwest of Qamdo, which helps to understand the climate history of the last 1 500 a there. Dendrochronological investigations on lateral and end-moraines prove that in the area the recent glacier advances happened between 1 820 and 1 860 A.D.

关 键 词：Eastern Tibet last GLACIAL inland ice UPPER QUATERNARY climate history DENDROCLIMATOLOGY impact of man on the vegetation. 

分 类 号：Q911[天文地球—古生物学与地层学]