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

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

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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 high-resolution 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.

Tibetan PlateauIce coreWater isotopesMeltwater eventsAbrupt climate change

Hongxi Pang、Wangbin Zhang、Shuangye Wu、Theo M.Jenk、Margit Schwikowski、Shugui Hou

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Key Laboratory of Coast and Island Development of Ministry of Education,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China

Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,Nanjing 210023,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

School of Oceanography,Shanghai Jiao Tong University,Shanghai 200240,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaResearch Funds for the Frontiers Science Center for Critical Earth Material Cycling,Nanjing University,the Fundamental ReseaCollaborative Innovation Center of Climate Change of Jiangsu ProvincePriority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)

418306449183710242021001020914380103

2024

10.1016/j.scib.2023.12.007

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(3)
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