Evidence for Asian summer monsoon precipitation instability of the Younger Dryas phase  

作　　者：Jie Zhou Weijian Zhou Huizhong Chen Xiangxi Xue G. Nanson 

机构地区：[1]Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Xian 710054, Peoples R China [2]Chinese Acad Sci, Desert Res Inst, Lanzhou 730000, Peoples R China [3]NW Univ Xian, Dept Geol, Xian 710000, Peoples R China [4]Univ Wollongong, Sch Geosci, Wollongong, NSW 2522, Australia

出　　处：《Chinese Science Bulletin》1999年第9期849-852,共4页

摘　　要：The loess and desert transitional zone of China responses sensitively to the Asian monsoon fluctuations. A high resolution loess-dust and aeolian sand-paleosols section records the climatic history of the Younger Dryas. Based upon AMS ¹⁴C dating of pollen concentrates and proxy climate indices including magnetic susceptibility, organic carbon content and grain size, it is demonstrated that the Asian monsoon climate manifests not only cooling as in other regions of the Northern Hemisphere, but also unusual oscillations in precipitation which were probably associated with atmospheric interactions between both the Northern and Southern Hemispheres and atmospheric pressure anomalies of topic Pacific Ocean （ENSO）.The loess and desert transitional zone of China responses sensitively to the Asian monsoon fluctuations. A high resolution loess-dust and aeolian sand-paleosols section records the climatic history of the Younger Dryas. Based upon AMS14C dating of pollen concentrates and proxy climate indices including magnetic susceptibilty, organic carbon content and grain size, it is demonstrated that the Asian monsoon climate manifests not only cooling as in other regions of the Northern Hemisphere, but also unusual oscillations in precipitation which were probably associated with atmospheric interactions between both the Northern and Southern Hemispheres and atmospheric pressure anomalies of topic Pacific Ocean (ENSO).

关 键 词：YOUNGER Dryas Asian summer MONSOON PRECIPITATION INSTABILITY loess/ DESERT transitional zone. 

分 类 号：P532[天文地球—古生物学与地层学]