青藏高原冰芯记录揭示早-中全新世发生多次融水事件  

Abrupt climate fluctuations in Tibet as imprints of multiple meltwater events during the early to mid-Holocene

作　　者：庞洪喜 张王滨 吴霜叶 Theo M.Jenk Margit Schwikowski 侯书贵 Hongxi Pang;Wangbin Zhang;Shuangye Wu;Theo M.Jenk;Margit Schwikowski;Shugui Hou(Key Laboratory of Coast and Island Development of Ministry of Education,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China;School of Oceanography,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Geology and Environmental Geosciences,University of Dayton,Dayton OH 45469,USA;Laboratory of Environmental Chemistry,Paul Scherrer Institute,Villigen PSI 5232,Switzerland;Oeschger Centre for Climate Change Research,University of Bern,Bern 3012,Switzerland;Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,Nanjing 210023,China)

机构地区：[1]Key Laboratory of Coast and Island Development of Ministry of Education,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China [2]School of Oceanography,Shanghai Jiao Tong University,Shanghai 200240,China [3]Department of Geology and Environmental Geosciences,University of Dayton,Dayton OH 45469,USA [4]Laboratory of Environmental Chemistry,Paul Scherrer Institute,Villigen PSI 5232,Switzerland [5]Oeschger Centre for Climate Change Research,University of Bern,Bern 3012,Switzerland [6]Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,Nanjing 210023,China

出　　处：《Science Bulletin》2024年第3期375-381,共7页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(41830644,91837102,and 42021001);the Research Funds for the Frontiers Science Center for Critical Earth Material Cycling,Nanjing University;the Fundamental Research Funds for the Central Universities(020914380103);the Collaborative Innovation Center of Climate Change of Jiangsu Province;the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。

摘　　要：Understanding the impact of meltwater discharge during the final stage of the Laurentide Ice Sheet(LIS)has important implications for predicting sea level rise and climate change.Here we present a highresolution ice-core isotopic record from the central Tibetan Plateau(TP),where the climate is sensitive to the meltwater forcing,and explore possible signals of the climate response to potential LIS meltwater discharges in the early to mid-Holocene.The record shows four abrupt large fluctuations during the 7–9 ka BP(kiloannum before present),reflecting large shifts of the mid-latitude westerlies and the Indian summer monsoon(ISM)over this period,and they corresponded to possible LIS freshwater events documented in other paleoclimate records.Our study suggests that multiple rapid meltwater discharge events might have occurred during the final stage of LIS.The finding implies the possibility of rapid sea level rise and unstable climate in the transition zone between the mid-latitude westerlies and the ISM due to fast polar ice retreat under the anthropogenic global warming.

关 键 词：Tibetan Plateau Ice core Water isotopes Meltwater events Abrupt climate change 

分 类 号：P534.632[天文地球—第四纪地质学] P343.6[天文地球—古生物学与地层学]