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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
Source PublicationQUATERNARY INTERNATIONAL
Volume464Issue:2018Pages:364-369
SubtypeArticle
AbstractRecords 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.
KeywordChinese Loess Plateau Climate Change Paleosol East Asia Monsoon Precipitation Delta O-18
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.quaint.2017.10.050
WOS KeywordICE-AGE TERMINATIONS ; EAST-ASIAN MONSOON ; MILLENNIAL-SCALE ; PEDOGENIC CARBONATE ; PALEOSOL CARBONATE ; GLOBAL MONSOON ; NORTHERN CHINA ; CLIMATE-CHANGE ; HULU CAVE ; PRECIPITATION
Indexed BySCI
Language英语
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000425236100005
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5236
Collection古环境研究室
Affiliation1.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
Recommended Citation
GB/T 7714
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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