应环境变化与地表过程重点实验室朱立平研究员的邀请，德国耶拿大学地理系Torsten Haberzettl博士将来我所开展学术访问与交流，并作学术报告： 

　　报告时间：2014年4月18日（星期五）下午14：00 - 16：00 

　　报告地点：青藏高原研究所办公楼915会议室 

　　主 持 人：朱立平研究员  

　　题  目：Tracking monsoon variations on the Tibetan Plateau using lake sediments 

　　报告人：Dr. Torsten Haberzettl（德国耶拿大学地理系）
 

　　简  介： 

　　Very rapid lake level changes reflect hydrological variations which seem to have occurred rather simultaneously at various sites on the Tibetan Plateau. One major shift occurred about 2000 years ago. This observation is probably linked to a shift in the precipitation regime and hence to a change in the monsoon system which in turn influences the water supply. This major shift to a weak monsoon and hence to drier conditions can be detected on large parts of the Tibetan Plateau. Clear co-variations with ENSO and a potential socio-cultural impact on the migration decision of the Romani population at the same time can be observed. Although, recent observations indicate a lake level rise in many lakes on the Tibetan Plateau and hence more moisture a similar shift to drier conditions today would be harmful to large portions of the world’s population. 

　　Based on this Late Holocene interpretation of various proxies an exceptional sedimentary record continuously spanning the past 24,000 years from Lake Nam Co will also be presented. During this time span extreme hydrological variations can be observed on the Tibetan Plateau partly responsible for lake levels of up to 200 m above the recent ones. Additionally, the post glacial intensification of the monsoon as well as major shifts in the regional atmospheric circulation systems and their global tele-connections can be traced. 

　　欢迎各位老师和同学参加！