DOI: 10.1016/j.quascirev.2016.08.005
论文题名: Geological record of meltwater events at Qinghai Lake, China from the past 40 ka
作者: Zhou W. ; Liu T. ; Wang H. ; An Z. ; Cheng P. ; Zhu Y. ; Burr G.S.
刊名: Quaternary Science Reviews
出版年: 2016
卷: 149 起始页码: 279
结束页码: 287
语种: 英语
英文关键词: Lacustrine record
; Meltwater event
; Old carbon effect
; Radiocarbon dating
; Total organic carbon
Scopus关键词: Carbon
; Glacial geology
; Organic carbon
; Carbon effects
; Lacustrine record
; Meltwater event
; Radiocarbon dating
; Total Organic Carbon
; Lakes
; core analysis
; deglaciation
; lacustrine environment
; marine isotope stage
; meltwater
; precipitation assessment
; radiocarbon dating
; sedimentation
; total organic carbon
; watershed
; China
; Qinghai
; Qinghai Lake
英文摘要: We report here on a previously unpublished sediment core from Qinghai Lake, China, that preserves a continuous record of sedimentation for the past 40 ka. A striking feature of the record is a set of distinct meltwater events recorded at 35, 19 and 14 ka respectively. These events are manifest as distinct pulses of relatively old organic radiocarbon in the sediments. We interpret these as a signal of glacial melting in the Qinghai Lake watershed. The meltwater signals are closely correlated to temperature and precipitation records associated with deglaciation. The events at 19 ka and 14 ka correspond to well-established high latitude Melt Water Pulse (MWP) events during Marine Isotope Stage (MIS) 2, and the 35 ka event corresponds to a period of pervasive high lake levels in western China during late MIS 3. We interpret these anomalous dates as the result of relatively old carbon that was destabilized by the glaciers, and released into the lake as the glaciers melted. The data indicate that this process takes thousands of years. We expect that the approach employed here to identify these events is generally applicable to any lake system with a significant glacial meltwater component. © 2016 Elsevier Ltd 资助项目: Zhou, W.
; Institute of Earth Environment, Chinese Academy of Sciences (IEECAS), No. 97 Yanxiang RoadChina
; 电子邮件: weijian@loess.llqg.ac.cn
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59472
Appears in Collections: 过去全球变化的重建
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作者单位: The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences (IEECAS), Xi'an, China; Xi'an AMS Center of IEECAS & Xi'an Jiaotong University, and Province Key Laboratory, Xi'an, China; Beijing Normal University, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhou W.,Liu T.,Wang H.,et al. Geological record of meltwater events at Qinghai Lake, China from the past 40 ka[J]. Quaternary Science Reviews,2016-01-01,149