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Microcodium in Chinese loess as a recorder for the oxygen isotopic composition of monsoonal rainwater
Zhang, Zeke1,2,3; Li, Gaojun2; Yan, Hong1; An, Zhisheng1
2018-01-15
发表期刊QUATERNARY INTERNATIONAL
卷号464期号:2018页码:364-369
文章类型Article
摘要Records of Asia Summer Monsoon (ASM) from the Chinese loess and the speleothem display distinct features. The very different proxies that were applied to the two archives may be responsible for this discrepancy. A direct comparison between the speleothem and the loess records under the same proxy system of rainwater delta O-18 may help to resolve this puzzle. Here we show that the calcified microcodium in the loess deposits may record the oxygen isotopic composition of the summer rainwater. A microcodium based delta O-18 record covering the past 140 kyrs was generated, which shows similar magnitude of the overall variation to that of the speleothem records. However, much weaker precession variability was registered in the microcodium record during the last interglacial period. Instead, the microcodium delta O-18 record is more consistent with the widely used summer monsoon proxy of magnetic susceptibility in the loess deposits with clear glacial-interglacial pattern. This similarity may originate from the low sedimentation rate of the interglacial paleosol layer that preferentially record the peak ASM signals on the precession band. It is also possible that the orbital variability of ASM between the North China and South China is inherently different with more ice-volume related influence in the north. A longer microcodium delta O-18 record in sequences of higher sedimentation rate and a reliable record of summer rainfall may help to resolve these possibilities. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.
关键词Chinese Loess Plateau Climate Change Paleosol East Asia Monsoon Precipitation Delta O-18
WOS标题词Science & Technology ; Physical Sciences
DOI10.1016/j.quaint.2017.10.050
关键词[WOS]ICE-AGE TERMINATIONS ; EAST-ASIAN MONSOON ; MILLENNIAL-SCALE ; PEDOGENIC CARBONATE ; PALEOSOL CARBONATE ; GLOBAL MONSOON ; NORTHERN CHINA ; CLIMATE-CHANGE ; HULU CAVE ; PRECIPITATION
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000425236100005
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5236
专题古环境研究室
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
2.Nanjing Univ, Dept Earth Sci, MOE Key Lab Surficial Geochem, 163 Xianlindadao, Nanjing 210023, Jiangsu, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhang, Zeke,Li, Gaojun,Yan, Hong,et al. Microcodium in Chinese loess as a recorder for the oxygen isotopic composition of monsoonal rainwater[J]. QUATERNARY INTERNATIONAL,2018,464(2018):364-369.
APA Zhang, Zeke,Li, Gaojun,Yan, Hong,&An, Zhisheng.(2018).Microcodium in Chinese loess as a recorder for the oxygen isotopic composition of monsoonal rainwater.QUATERNARY INTERNATIONAL,464(2018),364-369.
MLA Zhang, Zeke,et al."Microcodium in Chinese loess as a recorder for the oxygen isotopic composition of monsoonal rainwater".QUATERNARY INTERNATIONAL 464.2018(2018):364-369.
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